(38063) 1999 FH
Discovery[1]
Discovered byK. Korlević
M. Jurić
Discovery siteVišnjan Obs.
Discovery date16 March 1999
Designations
(38063) 1999 FH
1999 FH · 2000 SY275
Mars-crosser[1][2][3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc25.07 yr (9,158 days)
Aphelion3.0288 AU
Perihelion1.6559 AU
2.3424 AU
Eccentricity0.2931
3.59 yr (1,309 days)
324.91°
0° 16m 29.64s / day
Inclination11.880°
193.25°
108.31°
Physical characteristics
Dimensions3.395±0.703 km[4]
3.92 km (calculated)[3]
4.17±0.42 km[5]
990±50 h[6][lower-alpha 1]
0.176±0.035[5]
0.20 (assumed)[3]
0.287±0.172[4]
L[7] · S[3]
14.00[7] · 14.4[1][3][4][5] · 14.50±0.13[8]

    (38063) 1999 FH is a rare-type asteroid from the inner regions of the asteroid belt, classified as Mars-crosser and exceptionally slow rotator, approximately 4 kilometers in diameter. It was discovered on 16 March 1999, by Croatian astronomers Korado Korlević and Mario Jurić at Višnjan Observatory in Croatia.[2]

    Orbit and classification

    1999 FH orbits the Sun at a distance of 1.7–3.0 AU once every 3 years and 7 months (1,309 days). Its orbit has an eccentricity of 0.29 and an inclination of 12° with respect to the ecliptic.[1] A first precovery was taken at Steward Observatory in 1992, extending the body's observation arc by 7 years prior to its official discovery observation.[2]

    Physical characteristics

    SDSS photometry characterized 1999 FH as a rare and reddish L-type, which belong to the larger complex of stony asteroids.[7]

    Slow rotator and tumbler

    In September 2014, American astronomer Robert Stephens obtained a rotational lightcurve from photometric observations taken at the Center for Solar System Studies (CS3, U81) in California.[lower-alpha 1] It gave an exceptionally long rotation period of 990±50 hours with a brightness amplitude of 0.55 magnitude (U=2), which makes it one of the slowest rotators known to exist. It is also a suspected tumbling asteroid, which show a non-principal axis rotation.[6]

    Diameter and albedo

    According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, 1999 FH measures 3.395 and 4.17 kilometers in diameter and its surface has an albedo of 0.287 and 0.176, respectively.[4] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 3.92 kilometers with an absolute magnitude of 14.4.[3]

    Numbering and naming

    This minor planet was numbered by the Minor Planet Center on 28 March 2002.[9] As of 2018, it has not been named.[2]

    Notes

    1. 1 2 Robert Stephens light-curve plot of (38063) with a rotation period 990±50 hours and a brightness amplitude of 0.55 mag

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 38063 (1999 FH)" (2017-05-02 last obs.). Jet Propulsion Laboratory. Retrieved 26 May 2017.
    2. 1 2 3 4 "38063 (1999 FH)". Minor Planet Center. Retrieved 15 January 2017.
    3. 1 2 3 4 5 6 "LCDB Data for (38063)". Asteroid Lightcurve Database (LCDB). Retrieved 15 January 2017.
    4. 1 2 3 4 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. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 15 January 2017.
    5. 1 2 3 Alí-Lagoa, V.; Delbo', M. (July 2017). "Sizes and albedos of Mars-crossing asteroids from WISE/NEOWISE data" (PDF). Astronomy and Astrophysics. 603: 8. arXiv:1705.10263. Bibcode:2017A&A...603A..55A. doi:10.1051/0004-6361/201629917. Retrieved 21 October 2017.
    6. 1 2 Stephens, Robert D. (January 2015). "Asteroids Observed from CS3: 2014 July - September". The Minor Planet Bulletin. 42 (1): 70–74. Bibcode:2015MPBu...42...70S. ISSN 1052-8091. Retrieved 15 January 2017.
    7. 1 2 3 Carry, B.; Solano, E.; Eggl, S.; DeMeo, F. E. (April 2016). "Spectral properties of near-Earth and Mars-crossing asteroids using Sloan photometry". Icarus. 268: 340–354. arXiv:1601.02087. Bibcode:2016Icar..268..340C. doi:10.1016/j.icarus.2015.12.047. Retrieved 15 January 2017.
    8. ↑ 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. Retrieved 15 January 2017.
    9. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 February 2018.
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