988 Appella

988 Appella
Discovery [1]
Discovered byB. Jekhovsky
Discovery siteAlgiers Obs.
Discovery date10 November 1922
Designations
(988) Appella
Pronunciation/əˈpɛlə/
Named after
Paul Appell
(French mathematician)[2]
1922 MT · 1955 QJ1
main-belt · Themis [3]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc76.56 yr (27,964 days)
Aphelion3.8829 AU
Perihelion2.4017 AU
3.1423 AU
Eccentricity0.2357
5.57 yr (2,035 days)
308.57°
0° 10m 36.84s / day
Inclination1.5748°
41.726°
337.28°
Physical characteristics
Dimensions20.431±0.215 km[4][5]
20.44±0.33 km[6]
21.7±2.2 km[7]
22±2 km[8]
25.77 km (derived)[3]
25.91±1.2 km (IRAS:18)[9]
30.09±0.37 km[10]
7.0±1.0 h (dated)[11]
120 h[12]
0.0609 (derived)[3]
0.066±0.002[10]
0.08±0.02[8]
0.0871±0.009 (IRAS:18)[9]
0.09±0.02[7]
0.097±0.021[6][5]
0.1401±0.0208[4]
S [3]
11.2[4][9][10] · 11.50[7] · 11.50±0.27[13] · 11.60[1][3][6][8]

988 Appella, provisional designation 1922 MT, is a dark Themistian asteroid and slow rotator from the outer region of the asteroid belt, approximately 26 kilometers in diameter. It was discovered on 10 November 1922, by Russian–French astronomer Benjamin Jekhowsky at Algiers Observatory in Algeria, North Africa.[14] The asteroid was later named after French mathematician Paul Émile Appel.[2]

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  7. ^ a b c Cite error: The named reference Ali-Lagoa-2016 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Ali-Lagoa-2013 was invoked but never defined (see the help page).
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  12. ^ Cite error: The named reference Stephens-2013c was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference MPC-Appella was invoked but never defined (see the help page).