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762 Pulcova
Main-belt asteroid
Main-belt asteroid
| Field | Value |
|---|---|
| minorplanet | yes |
| background | #D6D6D6 |
| name | 762 Pulcova |
| image | 762Pulcova-SwRI.gif |
| caption | 762 Pulcova and satellite as seen with adaptive optics in 2000 |
| discovery_ref | |
| discoverer | G. N. Neujmin |
| discovered | 3 September 1913 |
| mpc_name | (762) Pulcova |
| pronounced | |
| adjective | Pulcovian |
| named_after | Pulkovo Heights |
| alt_names | 1913 SQ |
| mp_category | Main belt |
| orbit_ref | |
| epoch | 31 July 2016 (JD 2457600.5) |
| aphelion | 3.4801 AU (Q) |
| perihelion | 2.8291 AU (q) |
| semimajor | 3.1546 AU (a) |
| eccentricity | 0.10319 (e) |
| period | 5.60 yr (2046.5 d) |
| inclination | 13.089° (i) |
| asc_node | 305.76° (Ω) |
| mean_anomaly | 348.62° (M) |
| arg_peri | 189.54° (ω) |
| satellites | S/2000 (762) 1 |
| mean_radius | km |
| mass | 1.40 kg |
| density | 0.90 g/cm3 |
| sidereal_day | 5.839 hr |
| albedo | |
| magnitude | 11.93 to 14.79 |
| abs_magnitude | 8.28 |
| mean_motion | / day (n) |
| observation_arc | 100.08 yr (36553 d) |
| uncertainty | 0 |
| rotation | 5.839 h |
| moid | 1.84297 AU |
| jupiter_moid | 1.60162 AU |
| tisserand | 3.158 |
762 Pulcova is a main-belt asteroid. It was discovered by Grigoriy N. Neujmin in 1913, and is named after Pulkovo Observatory, near Saint Petersburg. Pulcova is 137 km in diameter,{{cite web |access-date=5 May 2016}} and is a C-type asteroid, which means that it is dark in colouring with a carbonate composition.
Photometric observations of this asteroid from Leura, Australia during 2006 gave a light curve with a period of 5.8403 ± 0.0005 hours and a brightness variation of 0.20 ± 0.02 in magnitude. This result is in agreement with previous studies.
Satellite
On February 22, 2000,{{cite web |access-date=2009-10-20}} (AO image) astronomers at the Canada–France–Hawaii Telescope on Mauna Kea, Hawaii, discovered a 15-km moon (roughly a tenth the size of the primary){{cite web |name-list-style=amp |access-date=2009-10-20}} (mentions both 90 Antiope and 762 Pulcova) orbiting Pulcova at a distance of 800 km. Its orbital period is 4 days. The satellite is about 4 magnitudes fainter than the primary. It was one of the first asteroid moons to be identified.
Density
In the year 2000, Merline estimated Pulcova to have a density of 1.8 g/cm3, which would make it more dense than the triple asteroid 45 Eugenia, and binary 90 Antiope.{{cite web |display-authors=6 |access-date=2009-10-21}} But estimates by Marchis in 2008 suggest a density of only 0.90 g/cm3, |access-date=2008-11-28 |archive-url=https://web.archive.org/web/20130702212735/http://home.earthlink.net/~jimbaer1/astmass.txt |archive-date=2013-07-02 |url-status=dead suggesting it may be a loosely packed rubble pile, not a monolithic object.
References
References
- ''Catalogue of the Mathematical, Historical, Bibliographical and Miscellaneous Portion of the Celebrated Library of M. Guglielmo Libri'', 1861, p. 216
- Magnitudes generated with JPL Horizons for the year 1950 through 2100
- Johnston, Robert. (September 1, 2005). "(762) Pulcova". Johnston's Archive.
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