148 Gallia
| Discovery[1] | |
|---|---|
| Discovered by | Paul Henry and Prosper Henry |
| Discovery date | 7 August 1875 |
| Designations | |
Named after | Gaul |
| Main belt | |
| Orbital characteristics[2][3] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 136.83 yr (49978 d) |
| Aphelion | 3.2883 AU (491.92 Gm) |
| Perihelion | 2.25843 AU (337.856 Gm) |
| 2.77338 AU (414.892 Gm) | |
| Eccentricity | 0.18568 |
| 4.62 yr (1687.0 d) | |
Average orbital speed | 17.74 km/s |
| 150.454° | |
| 0° 12m 48.229s / day | |
| Inclination | 25.294° |
| 145.062° | |
| 252.697° | |
| Earth MOID | 1.37806 AU (206.155 Gm) |
| Jupiter MOID | 2.452 AU (366.8 Gm) |
| Jupiter Tisserand parameter | 3.173 |
| Physical characteristics | |
| Dimensions |
97.75±3.7 km[2] 83.45 ± 5.07 km[4] |
| Mass | (4.89 ± 1.67) × 1018 kg[4] |
Mean density | 16.06 ± 6.22 g/cm3[4] |
Equatorial surface gravity | 0.0273 m/s² |
Equatorial escape velocity | 0.0517 km/s |
| 20.664 h (0.8610 d)[2][5] | |
| 0.1640±0.013 | |
| Temperature | ~167 K |
| GU[6] (Tholen) | |
| 7.63,[2] 7.72[7] | |
|
| |
148 Gallia (as Greek Γαλλία) is a large main-belt asteroid that is named after the Latin name for France: Gaul. Gallia was discovered by the French brothers Paul Henry and Prosper Henry on August 7, 1875, but the credit for this discovery was given to Prosper.[8] Based upon its spectrum, this is a GU-type asteroid in the Tholen classification taxonomy, while Bus and Binzel (2002) categorize it as an S-type asteroid.[6]
Photometric observations of this asteroid at the European Southern Observatory in 1977–78 gave a light curve with a period of 0.86098 ± 0.00030 days (20.6635 ± 0.0072 h) and a brightness variation of 0.32 in magnitude.[5] A 2007 study at the Palmer Divide Observatory in Colorado Springs, Colorado yielded a period of 20.666 ± 0.002 h with a magnitude variation of 0.21.[9]
This object is the namesake of a family of 22–113 asteroids that share similar spectral properties and orbital elements. Hence they may have arisen from the same collisional event. All members have a relatively high orbital inclination.[10]
References
- ↑
- 1 2 3 4 Yeomans, Donald K., "164 Eva", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- ↑ "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
- 1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336
, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1. - 1 2 Surdej, A.; Surdej, J. (September 1979), "Photoelectric lightcurves and rotation period of the minor planet 148 Gallia", Astronomy and Astrophysics Supplement Series, 37, pp. 471–474, Bibcode:1979A&AS...37..471S.
- 1 2 Lazzaro, D.; et al. (November 2004), "S3OS2: the visible spectroscopic survey of 820 asteroids", Icarus, 172 (1): 179–220, Bibcode:2004Icar..172..179L, doi:10.1016/j.icarus.2004.06.006.
- ↑ Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, 34, pp. 113–119, Bibcode:2007MPBu...34..113W.
- ↑ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 26, ISBN 3642297188.
- ↑ Warner, Brian D. (December 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - March-May 2007", The Minor Planet Bulletin, 34 (4), pp. 104–107, Bibcode:2007MPBu...34..104W.
- ↑ Novaković, Bojan; et al. (November 2011), "Families among high-inclination asteroids", Icarus, 216 (1), pp. 69–81, arXiv:1108.3740, Bibcode:2011Icar..216...69N, doi:10.1016/j.icarus.2011.08.016.
