(38063) 1999 FH
Asteroid in the inner asteroid belt
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(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 KorleviÄ and Mario JuriÄ at ViÅ¡njan Observatory in Croatia.[2]
| Discovery[1] | |
|---|---|
| Discovered by | K. KorleviÄ M. JuriÄ |
| Discovery site | Višnjan Obs. |
| Discovery date | 16 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 arc | 25.07 yr (9,158 days) |
| Aphelion | 3.0288 AU |
| Perihelion | 1.6559 AU |
| 2.3424 AU | |
| Eccentricity | 0.2931 |
| 3.59 yr (1,309 days) | |
| 324.91° | |
| 0° 16m 29.64s / day | |
| Inclination | 11.880° |
| 193.25° | |
| 108.31° | |
| Physical characteristics | |
| Dimensions | 3.395±0.703 km[4] 3.92 km (calculated)[3] 4.17±0.42 km[5] |
| 990±50 h[6][a] | |
| 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] | |
Orbit and classification
1999 FH orbits the Sun at a distance of 1.7â3.0 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.[a] 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
- Robert Stephens light-curve plot of (38063) with a rotation period 990±50 hours and a brightness amplitude of 0.55 mag
