148 Gallia

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148 Gallia
Discovery[1]
Discovered by Paul Henry and Prosper Henry
Discovery date 7 August 1875
Designations
MPC designation (148) Gallia
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)
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[edit]

  1. ^ [1]
  2. ^ a b c d Yeomans, Donald K., "164 Eva", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016. 
  3. ^ "The Asteroid Orbital Elements Database". astorb. Lowell Observatory. 
  4. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336Freely accessible, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  5. ^ a b 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. 
  6. ^ a b 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. 
  7. ^ 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. 
  8. ^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 26, ISBN 3642297188. 
  9. ^ 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. 
  10. ^ Novaković, Bojan; et al. (November 2011), "Families among high-inclination asteroids", Icarus, 216 (1), pp. 69–81, arXiv:1108.3740Freely accessible, Bibcode:2011Icar..216...69N, doi:10.1016/j.icarus.2011.08.016. 

External links[edit]