148 Gallia

148 Gallia is an asteroid from the central regions of the asteroid belt, approximately 90 kilometers (56 miles) in diameter. It was discovered on 7 August 1875, by the French brothers Paul Henry and Prosper Henry at the Paris, but the credit for this discovery was given to Prosper.^[1] It was named after the Latin name for the country of France, Gaul.^[3] Based upon its spectrum, it is an unusual G-type asteroid (GU) and a stony S-type asteroid in the Tholen and SMASS classification, respectively.^[4][18]

148 Gallia

Orbital diagram
Discovery[1]
Discovered by	P. M. Henry
Discovery site	Paris
Discovery date	7 August 1875
Designations
MPC designation	(148) Gallia
Pronunciation	/ˈɡæliə/[2]
Named after	Gaul[3] (Latin name for France)
Alternative designations	A875 PA
Minor planet category	main-belt[1][4] · (middle) Gallia[5]
Orbital characteristics[4]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc	138.37 yr (50,540 d)
Aphelion	3.2885 AU
Perihelion	2.2531 AU
Semi-major axis	2.7708 AU
Eccentricity	0.1868
Orbital period (sidereal)	4.61 yr (1,685 d)
Mean anomaly	278.58°
Mean motion	0° 12m 49.32s / day
Inclination	25.291°
Longitude of ascending node	145.01°
Argument of perihelion	252.79°
Physical characteristics
Mean diameter	80.87±1.04 km[6] 83.45±5.07 km[7] 85.91±23.39 km[8] 97.75±3.7 km[9] 98.09 km (derived)[10]
Mass	(4.89±1.67)×1018 kg[7]
Mean density	16.06±6.22 g/cm3[7]
Synodic rotation period	20.6592±0.0007 h[11] 20.66±0.01 h[11] 20.664 h[12] 20.665266 h[lower-alpha 1] 20.666±0.002 h[13][lower-alpha 2]
Geometric albedo	0.1640±0.013[9] 0.2013 (derived)[10] 0.21±0.12[8] 0.240±0.008[6]
Spectral type	Tholen = GU[4] SMASS = S[4][10] B–V = 0.858[4] U–B = 0.423[4]
Absolute magnitude (H)	6.97±0.84[14] 7.4[10] 7.4±0.1[15][16] 7.63[4][6][9] 7.67[8] 7.72±0.10[17]

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.^[12] A 2007 study at the Palmer Divide Observatory in Colorado, United States, yielded a period of 20.666 ± 0.002 hours with a magnitude variation of 0.21.^{[13][lower-alpha 2]}

This object is the namesake of the Gallia family (802), a small family of nearly 200 known stony asteroids that share similar spectral properties and orbital elements.^[19] Hence they may have arisen from the same collisional event. All members have a relatively high orbital inclination.^[20]

Notes

1. Warner (2011) web: modeled lightcurve gave a rotation period 20.665266 hours. Summary figures for (148) Gallia at the LCDB
2. Lightcurve plot of 148 Gallia, Palmer Divide Observatory, B. D. Warner (2007): rotation period 20.666±0.002 hours with a brightness amplitude of 0.21±0.02 mag. Quality code of 2+. Summary figures at the LCDB

References

1. "148 Gallia". Minor Planet Center. Retrieved 18 April 2018.
2. Noah Webster (1884) A Practical Dictionary of the English Language
3. Schmadel, Lutz D. (2007). "(148) Gallia". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 29. doi:10.1007/978-3-540-29925-7_149. ISBN 978-3-540-00238-3.
4. "JPL Small-Body Database Browser: 148 Gallia" (2017-10-28 last obs.). Jet Propulsion Laboratory. Retrieved 18 April 2018.
5. "Asteroid 148 Gallia". Small Bodies Data Ferret. Retrieved 24 October 2019.
6. Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
7. Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009 See Table 1.
8. Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63.
9. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
10. "LCDB Data for (148) Gallia". Asteroid Lightcurve Database (LCDB). Retrieved 18 April 2018.
11. Behrend, Raoul. "Asteroids and comets rotation curves – (148) Gallia". Geneva Observatory. Retrieved 18 April 2018.
12. Surdej, A.; Surdej, J. (September 1979). "Photoelectric lightcurves and rotation period of the minor planet 148 Gallia". Astronomy and Astrophysics Supplement Series. 37: 471–474. Bibcode:1979A&AS...37..471S. Retrieved 18 April 2018.
13. Warner, Brian D. (December 2007). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - March–May 2007". The Minor Planet Bulletin. 34 (4): 104–107. Bibcode:2007MPBu...34..104W. ISSN 1052-8091. Retrieved 18 April 2018.
14. 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.
15. Harris, A. W.; Young, J. W.; Dockweiler, Thor; Gibson, J.; Poutanen, M.; Bowell, E. (January 1992). "Asteroid lightcurve observations from 1981". Icarus. 95 (1): 115–147.ResearchsupportedbyLowellObservatoryEndowmentandNASA. Bibcode:1992Icar...95..115H. doi:10.1016/0019-1035(92)90195-D. ISSN 0019-1035. Retrieved 18 April 2018.
16. Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026. Retrieved 18 April 2018.
17. Warner, Brian D. (December 2007). "Initial Results of a Dedicated H-G Project". The Minor Planet Bulletin. 34 (4): 113–119. Bibcode:2007MPBu...34..113W. ISSN 1052-8091. Retrieved 18 April 2018.
18. Lazzaro, D.; Angeli, C. A.; Carvano, J. M.; Mothé-Diniz, T.; Duffard, R.; Florczak, M. (November 2004). "S 3OS 2: the visible spectroscopic survey of 820 asteroids". Icarus. 172 (1): 179–220. Bibcode:2004Icar..172..179L. doi:10.1016/j.icarus.2004.06.006. Retrieved 18 April 2018.
19. Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
20. Novakovic, Bojan; Cellino, Alberto; Knezevic, Zoran (November 2011). "Families among high-inclination asteroids". Icarus. 216 (1): 69–81. arXiv:1108.3740. Bibcode:2011Icar..216...69N. doi:10.1016/j.icarus.2011.08.016.

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 148 Gallia at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 148 Gallia at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters