Astronomy:3988 Huma
| Discovery [1] | |
|---|---|
| Discovered by | E. F. Helin |
| Discovery site | Palomar Obs. |
| Discovery date | 4 June 1986 |
| Designations | |
| (3988) Huma | |
| Pronunciation | /ˈhuːmə/[3] |
| Named after | Huma bird (Persian mythology)[2] |
| 1986 LA | |
| Minor planet category | Amor · NEO [1][2] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 29.61 yr (10,815 days) |
| |{{{apsis}}}|helion}} | 2.0335 AU |
| |{{{apsis}}}|helion}} | 1.0556 AU |
| 1.5445 AU | |
| Eccentricity | 0.3166 |
| Orbital period | 1.92 yr (701 days) |
| Mean anomaly | 61.265° |
| Mean motion | 0° 30m 48.6s / day |
| Inclination | 10.768° |
| Longitude of ascending node | 229.82° |
| 86.912° | |
| Earth MOID | 0.1781 AU · 69.4 LD |
| Physical characteristics | |
| Dimensions | 0.7 km[1] 0.782 km (calculated)[4] |
| Rotation period | 10.4±0.1 h[lower-alpha 1] |
| Geometric albedo | 0.20 (assumed)[4] |
| S [4] | |
| Absolute magnitude (H) | 17.9[1][4] · 17.97±0.15[5] · 18.17±0.29[6] |
3988 Huma, provisional designation 1986 LA, is an eccentric sub-kilometer asteroid and near-Earth object of the Amor group. It was discovered on 4 June 1986, by American astronomer Eleanor Helin at Palomar Observatory, California.[2] The asteroid measures approximately 700 to 800 meters in diameter and was named after the Huma bird from Iranian mythology.
Orbit and classification
Huma is a stony S-type asteroid that orbits the Sun in the inner main-belt at a distance of 1.1–2.0 AU once every 1 years and 11 months (701 days). Its orbit has an eccentricity of 0.32 and an inclination of 11° with respect to the ecliptic.[1] As no precoveries were taken, the body's observation arc begins with its discovery observation at Palomar in 1986.[2]
It has an Earth minimum orbit intersection distance of 0.1781 AU (26,600,000 km), which corresponds to 69.4 lunar distances.[1]
Physical characteristics
Rotation period
A rotational lightcurve of Huma was obtained by American astronomer Brian A. Skiff in July 2011. It gave a rotation period of 10.4±0.1 hours with a brightness variation of 0.24 magnitude ({{{1}}}).[lower-alpha 1]
Diameter and albedo
In the 1990s, Dutch–American astronomer Tom Gehrels estimated Huma to measure 0.7 kilometers in diameter, based on an assumed medium albedo of 0.15. More recently, the Collaborative Asteroid Lightcurve Link assumed a standard albedo for stony asteroids of 0.20 and calculated a diameter of 0.78 kilometers.[4]
Naming
This minor planet was named after the Huma bird from Persian mythology and Sufi poetry. The mythological bird never alights on the ground, and its appearance in the sky is said to be a sign of fortune. The asteroid's name was suggested by the SGAC Name An Asteroid Campaign[2] and its citation was published on 9 September 2014 (M.P.C. 89832).[7]
Notes
- ↑ 1.0 1.1 Skiff (2011) web: rotation period 10.4±0.1 hours with a brightness amplitude of 0.24 mag. Skiff, B.A. (2011) Posting on CALL web site. Summary figures for (3988) Huma at Collaborative Asteroid Lightcurve Link (CALL)
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "JPL Small-Body Database Browser: 3988 Huma (1986 LA)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2003988.
- ↑ 2.0 2.1 2.2 2.3 2.4 "3988 Huma (1986 LA)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=3988.
- ↑ huma (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=huma (Subscription or UK public library membership required.)
- ↑ 4.0 4.1 4.2 4.3 4.4 "LCDB Data for (3988) Huma". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=3988%7CHuma.
- ↑ Hicks, M.; Truong, T.; Gerhart, C.; McCormack, M.; Strojia, C.; Teague, S. (June 2011). "Broadband photometry of 3988 (1986 LA): A large low-V near-Earth Asteroid". The Astronomer's Telegram 3457 (3457): 1. Bibcode: 2011ATel.3457....1H. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ATel.3457....1H. Retrieved 27 September 2016.
- ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus 261: 34–47. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 27 September 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
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
- 3988 Huma at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- 3988 Huma at ESA–space situational awareness
- 3988 Huma at the JPL Small-Body Database
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