981 Martina

981 Martina
Discovery[1]
Discovered byS. Belyavskyj
Discovery siteSimeiz Obs.
Discovery date23 September 1917
Designations
(981) Martina
Named after
Henri Martin
(French historian)[2]
A917 SW · 1917 Σ92
1906 SD · 1928 TG
1942 EY · 1949 MF
1953 FG · 1959 GF
1959 JF · 1966 QA
A906 SD
main-belt[1][3] · (outer)
Themis[4][5]
Orbital characteristics[3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc112.98 yr (41,266 d)
Aphelion3.7284 AU
Perihelion2.4685 AU
3.0984 AU
Eccentricity0.2033
5.45 yr (1,992 d)
309.55°
0° 10m 50.52s / day
Inclination2.0633°
46.062°
297.91°
Physical characteristics
  • 28.87±1.7 km[6]
  • 31.70±1.29 km[7]
  • 32.545±0.124 km[8]
11.267±0.003 h[9][10]
10.9[1][3]

981 Martina (prov. designation: A917 SW or 1917 Σ92) is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 31 kilometers (19 miles) in diameter. It was discovered on 23 September 1917, by Russian astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula.[1] The C/B-type asteroid has a rotation period of 11.3 hours.[10] It was named after French historian and revolutionary Henri Martin (1810–1883).[2]

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  10. ^ a b Cite error: The named reference Higgins-2005a was invoked but never defined (see the help page).
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