3988 Huma

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.[3] The asteroid measures approximately 700 to 800 meters in diameter and was named after the Huma bird from Iranian mythology.

3988 Huma
Discovery [1]
Discovered byE. F. Helin
Discovery sitePalomar Obs.
Discovery date4 June 1986
Designations
(3988) Huma
Pronunciation/ˈhuːmə/[2]
Named after
Huma bird
(Persian mythology)[3]
1986 LA
Amor · NEO [1][3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc29.61 yr (10,815 days)
Aphelion2.0335 AU
Perihelion1.0556 AU
1.5445 AU
Eccentricity0.3166
1.92 yr (701 days)
61.265°
0° 30m 48.6s / day
Inclination10.768°
229.82°
86.912°
Earth MOID0.1781 AU · 69.4 LD
Physical characteristics
Dimensions0.7 km[1]
0.782 km (calculated)[4]
10.4±0.1 h[lower-alpha 1]
0.20 (assumed)[4]
S [4]
17.9[1][4] · 17.97±0.15[5] · 18.17±0.29[6]

    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.[3]

    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 (U=2+).[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[3] and its citation was published on 9 September 2014 (M.P.C. 89832).[7]

    Notes
    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. "JPL Small-Body Database Browser: 3988 Huma (1986 LA)" (2016-01-13 last obs.). Jet Propulsion Laboratory. Retrieved June 19, 2017.
    2. "huma". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
    3. "3988 Huma (1986 LA)". Minor Planet Center. Retrieved September 27, 2016.
    4. "LCDB Data for (3988) Huma". Asteroid Lightcurve Database (LCDB). Retrieved September 27, 2016.
    5. 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. Retrieved September 27, 2016.
    6. 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. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID 53493339. Retrieved September 27, 2016.
    7. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved September 27, 2016.
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