1172 Äneas

1172 Äneas
Discovery[1]
Discovered by Karl Wilhelm Reinmuth
Discovery date 17 October 1930
Designations
Named after
 Aeneas
1930 UA
Jupiter Trojan[1]
Orbital characteristics[1]
Epoch 2012-Mar-14
Aphelion 5.7585 AU (Q)
Perihelion 4.6552 AU (q)
5.2069 AU (a)
Eccentricity 0.10595
11.88 yr
56.053° (M)
Inclination 16.674°
247.33°
50.705°
Physical characteristics
Dimensions 143km (IRAS)[1]
8.7 hr[1]
Albedo 0.04[1]
14.65 to 16.73
8.33[1]

    1172 Äneas is a large 143 km Jupiter Trojan. 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.[2]

    JPL Small-Body Database list of the largest Jupiter Trojans based on IRAS data:
    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

    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.[3]

    References

    1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "JPL Small-Body Database Browser: 1172 Aneas (1930 UA)" (2012-01-18 last obs). Jet Propulsion Laboratory.
    2. ↑ "JPL Small-Body Database Search Engine: orbital class (TJN) and diameter > 50 (km)". JPL's Solar System Dynamics Group. Retrieved 2012-03-28.
    3. ↑ 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