162 Laurentia
162 Laurentia is a large and dark main-belt asteroid that was discovered by the French brothers Paul Henry and Prosper Henry on 21 April 1876, and named after Joseph Jean Pierre Laurent, an amateur astronomer who discovered asteroid 51 Nemausa.
A three-dimensional model of 162 Laurentia based on its light curve. | |
| Discovery | |
|---|---|
| Discovered by | Paul Henry and Prosper Henry |
| Discovery site | Paris |
| Discovery date | 21 April 1876 |
| Designations | |
MPC designation | (162) Laurentia |
| Pronunciation | /lɒˈrɛnʃiə/ |
Named after | Joseph Jean Pierre Laurent |
Alternative designations | A876 HB |
Minor planet category | main belt |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 113.88 yr (41596 d) |
| Aphelion | 3.5574 AU (532.18 Gm) |
| Perihelion | 2.4779 AU (370.69 Gm) |
Semi-major axis | 3.0177 AU (451.44 Gm) |
| Eccentricity | 0.17887 |
Orbital period (sidereal) | 5.24 yr (1914.7 d) |
Mean anomaly | 300.020° |
Mean motion | 0° 11m 16.872s / day |
| Inclination | 6.0977° |
Longitude of ascending node | 35.539° |
| 116.277° | |
| Earth MOID | 1.49465 AU (223.596 Gm) |
| Jupiter MOID | 1.47116 AU (220.082 Gm) |
| TJupiter | 3.214 |
| Physical characteristics | |
| Dimensions | 97.021±0.493 km |
| Mass | (1.452 ± 0.658/0.289)×1018 kg |
Mean density | 3.037 ± 1.376/0.604 g/cm3 |
Synodic rotation period | 11.8686 h (0.49453 d) |
| 0.051±0.006 | |
| C | |
| 9.16 | |
An occultation by Laurentia was observed from Clive, Alberta on 21 November 1999.
Photometric observations of this asteroid from multiple observatories during 2007 gave a light curve with a period of 11.8686 ± 0.0004 hours and a brightness variation of 0.40 ± 0.05 in magnitude. This is in agreement with previous studies in 1994 and 2007.
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