Astronomy:(90075) 2002 VU94
| Discovery[1] | |
|---|---|
| Discovered by | NEAT |
| Discovery site | Palomar Obs. |
| Discovery date | 13 November 2002 |
| Designations | |
| (90075) 2002 VU94 | |
| 2002 VU94 | |
| Minor planet category | Apollo · NEO · PHA[1][2] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 62.16 yr (22,704 days) |
| |{{{apsis}}}|helion}} | 3.3631 AU |
| |{{{apsis}}}|helion}} | 0.9045 AU |
| 2.1338 AU | |
| Eccentricity | 0.5761 |
| Orbital period | 3.12 yr (1,138 days) |
| Mean anomaly | 26.512° |
| Mean motion | 0° 18m 58.32s / day |
| Inclination | 8.9155° |
| Longitude of ascending node | 226.78° |
| 30.617° | |
| Earth MOID | 0.0301 AU · 11.7 LD |
| Physical characteristics | |
| Dimensions | 2.233±0.084 km[3] 2.59 km (calculated)[4] |
| Rotation period | 7.878±0.002 h[5] 7.879±0.002 h[lower-alpha 1] 7.88±0.01 h[6] 7.90±0.01 h[7] |
| Geometric albedo | 0.20 (assumed)[4] 0.294±0.040[3] |
| S (assumed)[4] | |
| Absolute magnitude (H) | 15.2[3] · 15.3[1][4] |
(90075) 2002 VU94 (provisional designation 2002 VU94) is an asteroid on an eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 2.5 kilometers in diameter. It was discovered on 13 November 2002, by astronomers of the Near-Earth Asteroid Tracking program at Palomar Observatory in California, United States.[2] It is one of the largest potentially hazardous asteroids known.[8]
Orbit and classification
2002 VU94 is a member of the dynamical Apollo group,[1][2] which are Earth-crossing asteroids. Apollo asteroids are the largest subgroup of near-Earth objects. It orbits the Sun at a distance of 0.9–3.4 AU once every 3 years and 1 month (1,138 days; semi-major axis of 2.13 AU). Its orbit has an eccentricity of 0.58 and an inclination of 9° with respect to the ecliptic.[1]
The body's observation arc begins with a precovery from the Digitized Sky Survey taken at the Palomar Observatory in October 1955, or 47 years prior to its official discovery observation.[2]
Close approaches
With an absolute magnitude of 15.3, 2002 VU94 is one of the brightest and largest known potentially hazardous asteroid (see PHA-list).[8] It has an Earth minimum orbital intersection distance of 0.0301 AU (4,500,000 km), which translates into 11.7 lunar distances.[1] On 18 May 2092, the body will make its closest near-Earth encounter at a nominal distance of 0.095 AU (37 LD).[1] The asteroid is also Mars-crosser, crossing the orbit of the Red Planet at 1.66 AU.
Physical characteristics
2002 VU94 is an assumed, stony S-type asteroid.[4]
Rotation period
In 2014 and 2017, several rotational lightcurves[lower-alpha 2] of 2002 VU94 were obtained from photometric observations by American astronomer Brian Warner at the Palmer Divide Station (U82) in California.[5][6][7][lower-alpha 1] Lightcurve analysis gave a consolidated rotation period of 7.879 hours with a brightness amplitude between 0.31 and 0.64 magnitude ({{{1}}}).[4][lower-alpha 1]
In 2017, Warner also modeled the photometric data and determined a sidereal period of 7.878512 hours, as well as a spin axis of (73.0°, −50.0°) in ecliptic coordinates (λ, β).[4]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, 2002 VU94 measures 2.233 kilometers in diameter and its surface has an albedo of 0.294,[3] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20, and calculates a diameter of 2.59 kilometers based on an absolute magnitude of 15.3.[4]
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 30 August 2004.[9] As of 2018, it has not been named.[2]
Notes
- ↑ 1.0 1.1 1.2 Warner (2018) web: Observation from 2017-08-12. Rotation period 7.879±0.002 hours with a brightness amplitude of 0.64±0.02 mag. Quality Code of 3-. Currently unpublished (not on ADS). Summary figures for (90075) at the LCDB
- ↑ Four lightcurve plots of (90075) 2002 VU94 by B. D. Warner at CS3 (2014/2017). Plot-1, Plot-2, Plot-3 and Plot-4. Summary figures at the LCDB and CS3 website.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "JPL Small-Body Database Browser: 90075 (2002 VU94)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2090075. Retrieved 18 January 2018.
- ↑ 2.0 2.1 2.2 2.3 2.4 "90075 (2002 VU94)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=90075. Retrieved 18 January 2018.
- ↑ 3.0 3.1 3.2 3.3 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T. et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal 814 (2): 13. doi:10.1088/0004-637X/814/2/117. Bibcode: 2015ApJ...814..117N. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N. Retrieved 18 January 2018.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 "LCDB Data for (90075)". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=90075%7C. Retrieved 18 January 2018.
- ↑ 5.0 5.1 Warner, Brian D. (July 2017). "Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2016 December thru 2017 April". The Minor Planet Bulletin 44 (3): 223–237. ISSN 1052-8091. Bibcode: 2017MPBu...44..223W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017MPBu...44..223W. Retrieved 18 January 2018.
- ↑ 6.0 6.1 Warner, Brian D. (January 2015). "Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 June-October". The Minor Planet Bulletin 42 (1): 41–53. ISSN 1052-8091. Bibcode: 2015MPBu...42...41W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015MPBu...42...41W. Retrieved 18 January 2018.
- ↑ 7.0 7.1 Warner, Brian D. (April 2015). "Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 October-December". The Minor Planet Bulletin 42 (2): 115–127. ISSN 1052-8091. Bibcode: 2015MPBu...42..115W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015MPBu...42..115W. Retrieved 18 January 2018.
- ↑ 8.0 8.1 "List of the Potentially Hazardous Asteroids (PHAs)". Minor Planet Center. https://www.minorplanetcenter.net/iau/lists/t_phas.html. Retrieved 18 January 2018.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 24 February 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form (info )
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- (90075) 2002 VU94 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- (90075) 2002 VU94 at ESA–space situational awareness
- (90075) 2002 VU94 at the JPL Small-Body Database
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