39 Laetitia: Difference between revisions
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Laetitia was discovered by [[Jean Chacornac|J. Chacornac]] on February 8, 1856 and named after [[Laetitia]], a minor [[Roman mythology|Roman]] goddess of gaiety. |
Laetitia was discovered by [[Jean Chacornac|J. Chacornac]] on February 8, 1856 and named after [[Laetitia]], a minor [[Roman mythology|Roman]] goddess of gaiety. |
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Observations of an [[occultation]] on March 21, 1998 produced several [[Chord ( |
Observations of an [[occultation]] on March 21, 1998 produced several [[Chord (astronomy)|chords]] indicating an ellipsoid of 219×142 km.<ref name=euroster>{{cite web |
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|date=1998-03-21 |
|date=1998-03-21 |
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|title=1998 European Asteroidal Occultation Results |
|title=1998 European Asteroidal Occultation Results |
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Revision as of 18:26, 11 July 2010
| Discovery | |
|---|---|
| Discovered by | J. Chacornac |
| Discovery date | February 8, 1856 |
| Designations | |
| none | |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 461.503 Gm (3.085 AU) |
| Perihelion | 366.877 Gm (2.452 AU) |
| 414.190 Gm (2.769 AU) | |
| Eccentricity | 0.114 |
| 1682.713 d (4.61 a) | |
Average orbital speed | 17.84 km/s |
| 58.261° | |
| Inclination | 10.383° |
| 157.168° | |
| 209.560° | |
| Physical characteristics | |
| Dimensions | 219×142km[2] 149.5 km[1] |
| Mass | ~3.5×1018 kg |
Mean density | 2.0? g/cm³ |
| ~0.0418 m/s² | |
| ~0.0790 km/s | |
| 0.2141 d (5.138 h)[1][3] | |
| Albedo | 0.287 (geometric) [1][4] |
| Temperature | ~158 K |
Spectral type | S[1] |
| 8.97[5] to 12.18 | |
| 6.1[1] | |
| 0.142" to 0.051" | |
39 Laetitia (Template:Pron-en) is a large, bright main belt asteroid.
Laetitia was discovered by J. Chacornac on February 8, 1856 and named after Laetitia, a minor Roman goddess of gaiety.
Observations of an occultation on March 21, 1998 produced several chords indicating an ellipsoid of 219×142 km.[2]
References
- ^ a b c d e f "JPL Small-Body Database Browser: 39 Laetitia". 2008-06-29 last obs. Retrieved 2008-12-01.
{{cite web}}: Check date values in:|date=(help) - ^ a b "1998 European Asteroidal Occultation Results". euroster.net (a website for Asteroidal Occultation Observers in Europe). 1998-03-21. Retrieved 2008-12-01. (Chords)
- ^ "Asteroid Lightcurve Paramaters". Planetary Science Institute. Archived from the original on 2006-06-14. Retrieved 2008-11-03.
- ^ "Asteroid Data Archive". Planetary Science Institute. Archived from the original on 2006-06-23. Retrieved 2008-11-03.
- ^ "AstDys (39) Laetitia Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2010-06-26.
External links
- Orbital simulation from JPL (Java) / Ephemeris
_mathilde.jpg){kind=small} | This article about an S-type asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it. |