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Astronomical observatory in Arizona, United States
Mount Lemmon Observatory (MLO), also known as the Mount Lemmon Infrared Observatory, is an astronomical observatory located on Mount Lemmon in the Santa
Mount_Lemmon_Observatory
Part of the Catalina Sky Survey
Mount Lemmon Survey (MLS) is a part of the Catalina Sky Survey with observatory code G96. MLS uses a 1.52 m (60 in) cassegrain reflector telescope (with
Mount_Lemmon_Survey
Mountain in Arizona, United States
Vista. List of Ultras of the United States Mount Lemmon Observatory Mount Lemmon Ski Valley Mount Lemmon Survey "Catalina 2 Reset". NGS Data Sheet. National
Mount_Lemmon
Eccentric sub-kilometer asteroid
It was first observed on 1 December 2008, by the Mount Lemmon Survey at Mount Lemmon Observatory in Arizona, United States. 2014 UR116 orbits the Sun
(672457)_2014_UR116
Trans-Neptunian object
discovered on 8 June 2013 by astronomers with the Mount Lemmon Survey at the Mount Lemmon Observatory in Arizona, United States. 2013 LU28 is approximately
(468861)_2013_LU28
Pair of main-belt asteroids
diameter and was discovered on 11 September 2010 by the Mount Lemmon Survey at Mount Lemmon Observatory. The similarity of the orbits of these asteroids was
(458271) 2010 UM26 and (796785) 2010 RN221
(458271)_2010_UM26_and_(796785)_2010_RN221
Non-periodic comet
first observed on 5 February 2018 by the Mount Lemmon Survey conducted at the Mount Lemmon Observatory near Tucson, Arizona. The discovery was announced
C/2018_C2_(Lemmon)
Aten asteroid
discovered on 4 March 2008, by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory near Tucson, Arizona, United States. 2008 EV5 started
(341843)_2008_EV5
Non-periodic comet
C/2025 A6 (Lemmon) is a non-periodic comet discovered by the Mount Lemmon Survey in images obtained on 3 January 2025. It made its closest approach to
C/2025_A6_(Lemmon)
Sub-kilometer asteroid
September 2017, by cometary discoverer Alex Gibbs with the Mount Lemmon Survey at Mount Lemmon Observatory, Arizona, in the United States. It forms an asteroid
2017_SN16
Small asteroid which entered Earth's atmosphere in January 2014
Kowalski at the Mount Lemmon Survey at an apparent magnitude of 19 using a 1.52-meter (60 in) reflecting telescope at Mount Lemmon Observatory. 2014 AA was
2014_AA
Centaur
29 October 1999, by astronomers of the Catalina Sky Survey at Mount Lemmon Observatory in Arizona, United States. The minor planet was named after Elatus
31824_Elatus
Trans-Neptunian object
observed on 1 November 2005, by astronomers with the Mount Lemmon Survey at the Mount Lemmon Observatory in Arizona, United States. The unusual object measures
2005_VX3
Non-periodic comet
the comae of comets C/2012 F6 (Lemmon) and C/2012 S1 (ISON). Comet Lemmon on 1 March from Mount Burnett Observatory Lemmon in conjunction with C/2011 L4
C/2012_F6_(Lemmon)
Hyperbolic comet
long period comet that was discovered by G. J. Leonard at the Mount Lemmon Observatory on 3 January 2021 (a year before perihelion) when the comet was
C/2021_A1_(Leonard)
Temporary satellite of Earth
discovered at the Mount Lemmon Observatory by astronomers Theodore Pruyne and Kacper Wierzchoś on 15 February 2020, as part of the Mount Lemmon Survey or Catalina
2020_CD3
Astronomical observatory (1963–)
in the late 1960s. It was moved to the Mount Lemmon Observatory in 1972 and is known as the Steward Observatory Telescope. A 1.52 m (60 in) aluminium-mirror
Catalina_Station
Near-Earth micro-asteroid
observed on 3 April 2013, by astronomers of the Mount Lemmon Survey conducted at the Mount Lemmon Observatory near Tucson, Arizona, United States. The asteroid
2013_GM3
This is a list of observatory codes (IAU codes or MPC codes) published by the Minor Planet Center. For a detailed description, see observations of small
List_of_observatory_codes
Observatory in Tucson, Arizona (US)
Steward Observatory manages three different observing locations in southern Arizona: Mount Graham International Observatory (MGIO), Mount Lemmon Station
Steward_Observatory
Micro-asteroid
20 January 2018, by astronomers of the Catalina Sky Survey at Mount Lemmon Observatory in Arizona, United States, the day after the closest flyby, due
2018_BF3
Near-Earth micro-asteroid
was first observed by astronomers of the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, on 4 February 2018, during its sub-lunar close encounter
2018_CB
Jupiter trojan asteroid
November 1999, by astronomers with the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, in the United States. The P-type asteroid has a rotation
15094_Polymele
Near-Earth asteroid
Catalina Sky Survey, using a dedicated 0.68-meter telescope at Mount Lemmon Observatory in Arizona, United States. Originally listed with a Torino Scale
(417634)_2006_XG1
This is a partial list of astronomical observatories ordered by name, along with initial dates of operation (where an accurate date is available) and
List of astronomical observatories
List_of_astronomical_observatories
Bright sub-kilometer asteroid
April 2006, by astronomers of the Catalina Sky Survey conducted at Mount Lemmon Observatory, Arizona, United States. During preliminary observations, it was
(391211)_2006_HZ51
Very small asteroid
diameter. It was first observed by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory, Arizona, on 8 February 2018, one day prior its close
2018_CN2
Main-belt asteroid
first observed on 16 December 2015, by the Catalina Sky Survey at Mount Lemmon Observatory in Arizona, United States. 2015 YU9 is a member of the dynamical
(842812)_2015_YU9
Near-Earth micro-asteroid
observed on 26 February 2018, by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory, Arizona, five days prior to its sub-lunar close encounter
2018_DV1
Highly-inclined centaur
discovered on 1 November 2005, by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory near Tucson, Arizona. Precovery images have been found
(434620)_2005_VD
Supernova remnant in the constellation Taurus
from JWST Image of Crab Nebula from HST Image of Crab Nebula from Mount Lemmon Observatory Image of Crab Nebula from KPNO Lists of nebulae List of Messier
Crab_Nebula
Observatory
testing, and occasionally for research purposes. Mount Lemmon Observatory List of astronomical observatories "UMN Infrared Astronomy". University of Minnesota
O'Brien_Observatory
Near-Earth micro-asteroid
on 5 April 2010, by astronomers of the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, United States, four days before a close approach to Earth
2010_GA6
Asteroid discovered in 2017
diameter. It was first observed by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory on 29 September 2017, three days prior to its sub-lunar
2017_SX17
Galaxy in the constellation Leo
right of the image above NGC 3745 and NGC 3746 which was taken by Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Leo Right ascension
NGC_3748
Science summer camp in Arizona, U.S.
early camps took place at the Mount Lemmon Station Observatory atop Mount Lemmon, near Tucson, Arizona. On Mount Lemmon, the campers have access to a
Astronomy_Camp
Business region in southern Arizona
International Observatory Kitt Peak National Observatory Fred Lawrence Whipple Observatory (Mount Hopkins) Mount Lemmon Observatory Catalina Station (Mount Bigelow)
Optics_Valley
Intermediate spiral galaxy in the constellation Leo
image of M65 M65 by Hubble Space Telescope M65 as imaged from the Mount Lemmon Observatory Messier 65 by 2MASS List of Messier objects "Messier 65 through
Messier_65
Small near-Earth object of the Apollo group
September 2018, by astronomer B. M. Africano with the Mount Lemmon Survey at Mount Lemmon Observatory, Arizona, United States. The asteroid's orbit determination
2018_RY7
Supernova remnant in the constellation Cassiopeia
the Mount Lemmon Observatory Cassiopeia A observed by the Hubble Space Telescope X-ray image of Cassiopeia A taken with the Einstein Observatory Cassiopeia A
Cassiopeia_A
Spiral galaxy in the constellation Virgo
(left) and NGC 5363 (right), imaged by the Cerro Tololo Inter-American Observatory Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin
NGC_5364
Closed US Air Force surveillance radar station
(all coordinates) GPX (primary coordinates) GPX (secondary coordinates) Mount Lemmon Air Force Station (ADC ID: M-92, NORAD ID: Z-92) is a closed United States
Mount Lemmon Air Force Station
Mount_Lemmon_Air_Force_Station
Galaxy cluster in the constellation Ursa Major
of this galaxy cluster, with the Schulman 0.8m Telescope on the Mount Lemmon Observatory "ACO 1185". SIMBAD. Centre de données astronomiques de Strasbourg
Abell_1185
Galaxy in the constellation Canes Venatici
NGC 5033 NGC 5033 imaged by the Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Canes Venatici Right ascension 13h 13m 27.4737s Declination
NGC_5033
Sub-kilometer asteroid on an eccentric orbit
observed on 20 December 2017, by astronomers with the Mount Lemmon Survey at Mount Lemmon Observatory near Tucson, Arizona, in the United States. On 29 January
(585310)_2017_YZ1
Spiral galaxy in the constellation Pisces
NGC 488 NGC 488 imaged by the Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Pisces Right ascension 01h 21m 46.7904s Declination
NGC_488
Near-Earth asteroid
18 January 2018, by astronomers of the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, United States, just hours before passing about 0.10 lunar
2018_BD
Galaxy in the constellation Pegasus
NGC 7814 NGC 7814 by the Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Pegasus Right ascension 00h 03m 14.9103s Declination +16° 08′ 43
NGC_7814
Galaxy in the constellation Ursa Major
NGC 5448 NGC 5448 imaged by the 32-inch Schulman Telescope at Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Ursa Major Right ascension
NGC_5448
Asteroid
observed on 7 February 2018, by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory, Arizona, United States. The discovery occurred the
2018_CF2
Near-Earth micro-asteroid and quasi-satellite
Gregory Leonard on March 19, 2017, observing for the Mt. Lemmon Survey from Mount Lemmon Observatory. Its orbit is moderately eccentric (0.26), low inclination
2017_FZ2
Periodic comet
October 2012). "Splitting event in comet 168P/Hergenrother". Remanzacco Observatory in Italy – Comets & Neo. Retrieved 28 October 2012. P. Plait (5 November
168P/Hergenrother
Galaxy in the constellation Fornax
discovered by BlackGEM on 21 January 2025. NGC 1398 imaged by the Mount Lemmon Observatory NGC 1398 imaged by GALEX DSS image of NGC 1398 NGC 1398 imaged
NGC_1398
Mountain in Arizona, United States
to the Mount Graham International Observatory area, where multiple organizations have set up large telescopes in a few separate observatories authorized
Mount_Graham
Meteoroid that impacted near Ontario, Canada in November 2022
hours before impact by David Rankin at Mount Lemmon Observatory, during routine observations for the Mount Lemmon Survey. The first image was taken at 04:53
2022_WJ1
Small near-Earth asteroid
18 September 2020 by the Mount Lemmon Survey under astronomer Kacper W. Wierzchoś, stationed at the Mount Lemmon Observatory in Tucson, Arizona. The asteroid
2020_SW
Japanese geochemist
Minoruozima was discovered in 2011 by the Catalina Sky Survey at Mount Lemmon Observatory and named in his honor. Among his many publications, a number of
Minoru_Ozima
Galaxy in the constellation Canes Venatici
Sloan Digital Sky Survey NGC 4151 with NGC 4156 imaged by the Mount Lemmon Observatory "Results for object NGC 4156". NASA/IPAC Extragalactic Database
NGC_4156
Emission nebula in the constellation Orion
Sh-279 Nebula Sh-279 as taken from the Mount Lemmon Observatory Observation data: J2000.0 epoch Right ascension 05h 35m 16.2s Declination −04° 47′ 07″
Sh_2-279
Galaxy pair in the constellation Draco
the most distant galaxy. The image taken by the telescope at the Mount Lemmon observatory does not allow us to decide. There is no publication that is only
NGC_6365
Galaxy in the constellation Pegasus
NGC 7806 NGC 7806 (center) by the 32-inch Schulman Telescope at Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Pegasus Right ascension
NGC_7806
Project to discover comets, asteroids, and near-Earth objects
level of 90% or better. The Catalina Sky Survey, located at the Mount Lemmon Observatory in the Catalina Mountains north of Tucson, carries out searches
Catalina_Sky_Survey
Galaxy in the constellation Virgo
NGC 5850 (left) and NGC 5846 (right) captured by Adam Block (from Mount Lemmon Observatory/University of Arizona).
NGC_5850
Micro-asteroid classified as near-Earth object of the Apollo group and Aten group
February 2017, by astronomers of the Catalina Sky Survey conducted at Mount Lemmon Observatory, Arizona, United States. 2017 DR109 was first observed by astronomer
2017_DR109
Oort cloud comet
analysis of Mount Lemmon Observatory imagery by Gareth V. Williams and Pan-STARRS imagery in Haleakalā. Precovery images from Mount Lemmon were first taken
Comet_ISON
Small near-Earth asteroid
group. It was first observed by the Catalina Sky Survey at the Mount Lemmon Observatory on 7 January 2019. It passed within 0.18 lunar distances, or 69
2019_BO
Periodic comet
magnitude from images taken from the 1.5 m (59 in) telescope of the Mount Lemmon Observatory. Orbital calculations showed it had reached its most recent perihelion
449P/Leonard
Galaxy in the constellation Camelopardalis
Kōichi Itagaki on 5 August 2021. NGC 1961 by GALEX NGC 1961 by Mount Lemmon Observatory NGC 1961 by DSS NGC 1961 by Hubble Space Telescope "Results for
NGC_1961
Planetary nebula in the constellation Hydra
Emission nebula Planetary nebula The Abell 33 nebula as seen from Mount Lemmon Observatory Observation data: J2000 epoch Right ascension 09h 39m 09.2s Declination
Abell_33
Galaxy in the constellation Lynx
galaxies, respectively. SDSS image of NGC 2683 NGC 2683 imaged by the Mount Lemmon Observatory NGC 2683 mosaic by Hubble Space Telescope 6’x2’ view "NASA/IPAC
NGC_2683
Galaxy in the constellation of Virgo
a past interaction with another galaxy. Observations by the Arecibo Observatory revealed an HI cloud about 15 arcminutes northwest of the centre but
NGC_5701
Reflection nebula in the constellation Monoceros
NGC 2170 Reflection nebula Taken from the Mount Lemmon Observatory Observation data: J2000 epoch Right ascension 06h 07m 31.3s Declination −06° 23′ 53″
NGC_2170
Galaxy in the constellation Leo
NGC 3338 NGC 3338 imaged by the 32-inch Schulman Telescope in Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Leo Right ascension
NGC_3338
Near-earth object and asteroid
first observed on 5 March 2014, by the Catalina Sky Survey at Mount Lemmon Observatory in Arizona, United States. As of 2017, it has not since been observed
2014_EC
Near-Earth asteroid
between 15 and 35 metres (49 and 110 feet). It was discovered by the Mount Lemmon Survey in Tucson, Arizona on 10 May 2026. Classified as an Earth-crossing
2026_JH2
Galaxy in the constellation Virgo
NGC 4691 NGC 4691 imaged by the Schulman 0.8m Telescope at Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Virgo Right ascension
NGC_4691
Planetary nebula in the Cancer constellation
31 Emission nebula Planetary nebula Abell 31 as seen from the Mount Lemmon Observatory Observation data: J2000 epoch Right ascension 08h 54m 11.4s Declination
Abell_31
Intermediate spiral galaxy in the constellation Virgo
The galaxy pair NGC 5719 and NGC 5713 taken at Mount Lemmon Observatory/University of Arizona (Adam Block).
NGC_5719
Galaxy in the constellation Leo Minor
2001ac (type gap, mag. 18.2) was discovered by LOTOSS (Lick Observatory and Tenagra Observatory Supernova Searches) on 12 March 2001. This supernova was
NGC_3504
Main-belt asteroid
on 1 March 2000, by astronomers with the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, United States. It was named for Canadian astronomer Elizabeth
50719_Elizabethgriffin
Very small near-Earth asteroid
arc of only 8 days begins with its official first observation at Mount Lemmon Observatory on 28 January 2019. 2019 BZ3 has an Earth minimum orbital intersection
2019_BZ3
Asteroid classified as a near-Earth object
9 February 2018, by astronomers of the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, during its close approach to Earth. 2018 CY2 is an Apollo
2018_CY2
Spiral galaxy in the constellation Cetus
August 1982. SN 2006G (Type II, mag. 17.5) was discovered by the Lick Observatory Supernova Search (LOSS) on 13 January 2006. The galaxy's large apparent
NGC_521
Periodic comet
designated D/1960 S1 until recovered by the Mount Lemmon Survey on 17 September 2012. "271P/van Houten–Lemmon – JPL Small-Body Database Lookup". ssd.jpl
271P/van_Houten–Lemmon
nightly archival images from the 1.5 meter survey telescope at Mount Lemmon Observatory to discover new Asteroids. DesignCrowd, a crowdsourcing marketplace
List of crowdsourcing projects
List_of_crowdsourcing_projects
Galaxy in the constellation Andromeda
IC 239 IC 239 imaged by the 32-inch Schulman Telescope of Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Andromeda Right ascension
IC_239
Spiral galaxy in the constellation Ursa Major
NGC 3614 NGC 3614 by the 32-inch Schulman Telescope at Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Ursa Major Right ascension
NGC_3614
Near-Earth asteroid
approach on 4 March 2013 at 07:35 UTC. 2013 EC was discovered by the Mount Lemmon Observatory in Arizona, United States, on March 2, 2013. Asteroid 2013 EC is
2013_EC
Galaxy in the constellation Triangulum
NGC 925 NGC 925 imaged with the 32 inch telescope at Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Triangulum Right ascension 02h
NGC_925
American astronomer (born 1963)
while observing with the CSS 1.5 meters (59 in) telescope at Mount Lemmon Observatory, he discovered 2008 TC3. Approximately 20 hours after its discovery
Richard_Kowalski
Galaxy in the constellation Leo
Copeland Septet with NGC 3746 in bottom right, imaged by Mount Lemmon Observatory
NGC_3746
Galaxy in the constellation Virgo
4698 (SDSS DR14) NGC 4698 (HST) NGC 4698 by a Schulman telescope at Mt. Lemmon, AZ. Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin
NGC_4698
Galaxy in the constellation Pegasus
NGC 7241 NGC 7241 by the 32-inch Schulman Telescope at Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Pegasus Right ascension 22h
NGC_7241
Galaxy in the constellation Crater
observed in NGC 3672: SN 2007bm was discovered by R. Martin of the Perth Observatory in images taken by the Perth Automated Supernova Search on 20 and 21
NGC_3672
Galaxy in the constellation Pegasus
NGC 7741 NGC 7741 by the 32-inch Schulman Telescope at Mount Lemmon Observatory Observation data (J2000 epoch) Constellation Pegasus Right ascension 23h
NGC_7741
Galaxy in the constellation Camelopardalis
pair with IC 467, which lies 20 arcminutes away. NGC 2336 by the Mount Lemmon Observatory NGC 2336 by GALEX NGC 2336 by the HST DSS NGC 2336 is the quintessential
NGC_2336
Planetary nebula in the constellation Aquila
Abell 70 Emission nebula Planetary nebula As seen from Mount Lemmon Observatory Observation data: J2000 epoch Right ascension 20h 31m 33.2s Declination
Abell_70
Month of 1966
the moons of Saturn, was captured on photographs taken by the Mount Lemmon Observatory and reviewed by astronomer Richard L. Walker, but was initially
December_1966
Galaxy in the constellation Draco
6286 (above) as seen through the 0.81 m Schulman Telescope at Mount Lemmon Observatory. Observation data (J2000 epoch) Constellation Draco Right ascension
NGC_6285
rapid temperature changes or localized heating or cooling. At Mount Lemmon Observatory, two 1.5 meter diameter telescopes have a Cer-Vit glass mirror
Cer-Vit
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