1172 Äneas

From Wikipedia, the free encyclopedia
Jump to: navigation, search
1172 Äneas
Discovery[1]
Discovered by Karl Wilhelm Reinmuth
Discovery date 17 October 1930
Designations
MPC designation (1172) Äneas
Named after
Aeneas
1930 UA
Jupiter Trojan[1]
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 85.49 yr (31227 days)
Aphelion 5.7579 AU (861.37 Gm) (Q)
Perihelion 4.6779 AU (699.80 Gm) (q)
5.2179 AU (780.59 Gm) (a)
Eccentricity 0.10349 (e)
11.92 yr (4353.52 d)
188.37° (M)
0° 4m 57.691s / day (n)
Inclination 16.664° (i)
247.33° (Ω)
51.171° (ω)
Earth MOID 3.69067 AU (552.116 Gm)
Jupiter MOID 0.476014 AU (71.2107 Gm)
Jupiter Tisserand parameter 2.906
Physical characteristics
Dimensions 143 km (IRAS)[1]
Mean radius
71.41±2.4 km
8.705 h (0.3627 d)[1]
0.0403±0.003[1]
14.65 to 16.73
8.33[1]

1172 Äneas is a large 143 km L5 Jupiter Trojan.[2] It was discovered by Karl Wilhelm Reinmuth at the Landessternwarte Heidelberg-Königstuhl in Heidelberg, Germany, on October 17, 1930.[1] Its provisional designation was 1930 UA. It is named after Aeneas, a mythological Trojan prince.

Based on IRAS data, Äneas is 143 km in diameter and is the 4th largest Jupiter Trojan.[3]

The largest Jupiter trojans
Trojan Diameter (km)
624 Hektor 225
911 Agamemnon 167
1437 Diomedes 164
1172 Äneas 143
617 Patroclus 141
588 Achilles 135
1173 Anchises 126
1143 Odysseus 126
Source: JPL Small-Body Database, IRAS data

Photometric observations of this asteroid during 1993 were used to build a light curve showing a rotation period of 8.708 ± 0.009 hours with a brightness variation of 0.27 ± 0.01 magnitude.[4]

References[edit]

  1. ^ a b c d e f g h "JPL Small-Body Database Browser: 1172 Aneas (1930 UA)" (2012-01-18 last obs). Jet Propulsion Laboratory. Retrieved 1 May 2016. 
  2. ^ "List Of Jupiter Trojans". Minor Planet Center. 
  3. ^ "JPL Small-Body Database Search Engine: orbital class (TJN) and diameter > 50 (km)". JPL's Solar System Dynamics Group. Retrieved 2012-03-28. 
  4. ^ Mottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; Hahn, Gerhard; Schober, Hans-Josef; Lahulla, Felix; Delbò, Marco; Lagerkvist, Claes-Ingvar (May 2011). "Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects". The Astronomical Journal. 141 (5): 170. Bibcode:2011AJ....141..170M. doi:10.1088/0004-6256/141/5/170. 

External links[edit]