![]() Orbital diagram | |
Discovery [1] | |
---|---|
Discovered by | P. M. Henry |
Discovery site | Paris |
Discovery date | 7 August 1875 |
Designations | |
(148) Gallia | |
Pronunciation | /ˈɡæliə/ [2] |
Named after |
Gaul
[3] (Latin name for France) |
A875 PA | |
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 |
2.7708 AU | |
Eccentricity | 0.1868 |
4.61 yr (1,685 d) | |
278.58 ° | |
0° 12m 49.32s / day | |
Inclination | 25.291° |
145.01° | |
252.79° | |
Physical characteristics | |
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] |
20.6592±0.0007
h
[11] 20.66±0.01 h [11] 20.664 h [12] 20.665266 h [a] 20.666±0.002 h [13] [b] | |
0.1640±0.013
[9] 0.2013 (derived) [10] 0.21±0.12 [8] 0.240±0.008 [6] | |
Tholen =
GU
[4] SMASS = S [4] [10] B–V = 0.858 [4] U–B = 0.423 [4] | |
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] | |
Gallia ( minor planet designation: 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]
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] [b]
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]
![]() Orbital diagram | |
Discovery [1] | |
---|---|
Discovered by | P. M. Henry |
Discovery site | Paris |
Discovery date | 7 August 1875 |
Designations | |
(148) Gallia | |
Pronunciation | /ˈɡæliə/ [2] |
Named after |
Gaul
[3] (Latin name for France) |
A875 PA | |
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 |
2.7708 AU | |
Eccentricity | 0.1868 |
4.61 yr (1,685 d) | |
278.58 ° | |
0° 12m 49.32s / day | |
Inclination | 25.291° |
145.01° | |
252.79° | |
Physical characteristics | |
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] |
20.6592±0.0007
h
[11] 20.66±0.01 h [11] 20.664 h [12] 20.665266 h [a] 20.666±0.002 h [13] [b] | |
0.1640±0.013
[9] 0.2013 (derived) [10] 0.21±0.12 [8] 0.240±0.008 [6] | |
Tholen =
GU
[4] SMASS = S [4] [10] B–V = 0.858 [4] U–B = 0.423 [4] | |
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] | |
Gallia ( minor planet designation: 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]
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] [b]
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]