762 Pulcova and satellite as seen with adaptive optics in 2000
|Discovered by||G. N. Neujmin|
|Discovery date||September 3, 1913|
|Alternative names||1913 SQ|
|Minor planet category||Main belt|
|Epoch January 4, 2010 (2455200.5)|
|Aphelion||3.4744 AU (Q)|
|Perihelion||2.8343 AU (q)|
|Semi-major axis||3.1543 AU (a)|
|Orbital period||5.60 yr|
|Mean anomaly||287.18° (M)|
|Longitude of ascending node||305.79°|
|Argument of perihelion||189.06°|
|Satellites||S/2000 (762) 1|
|Mean density||0.90 g/cm3|
|Sidereal rotation period||5.839 hr|
|Apparent magnitude||11.93 to 14.79|
|Absolute magnitude (H)||8.28|
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, 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.
On February 22, 2000, astronomers at the Canada-France-Hawaii Telescope on Mauna Kea, Hawaii, discovered a small, 15-km moon (roughly a 10th the size of the primary) orbiting Pulcova at a distance of 800 km. The satellite is about 4 magnitudes fainter than the primary. It was one of the first asteroid moons to be identified.
In the year 2000, Merline estimated Pulcova to have a density of 1.8 g/cm³, which would make it more dense than the binary asteroids 45 Eugenia and 90 Antiope. But estimates by Marchis in 2008 suggest a density of only 0.90 g/cm³, suggesting it may be a loosely-packed rubble pile, not a monolithic object.
- "762 Pulcova". SwRI. 2000-02-22. Retrieved 2009-10-20. (AO image)
- "JPL Small-Body Database Browser: 762 Pulcova (1913 SQ)". 2009-09-22 last obs. Retrieved 2009-10-20.
- Jim Baer (2008). "Recent Asteroid Mass Determinations". Personal Website. Retrieved 2008-11-28.
- Magnitudes generated with JPL Horizons for the year 1950 through 2100
- Oey, Julian (December 2006), "Lightcurves analysis of 10 asteroids from Leura Observatory", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 33 (4): 96–99, Bibcode:2006MPBu...33...96O.
- Dr. William J. Merline and Maria Martinez (2000-10-26). "Astronomers Image Double Asteroid". SwRI Press Release. Retrieved 2009-10-20. (mentions both 90 Antiope and 762 Pulcova)
- W.J. Merline (SwRI), L.M. Close (ESO, U. Arizona), C. Dumas (JPL), J.C. Shelton (Mt. Wilson Obs.), F. Menard (CFHT), C.R. Chapman, D.C. Slater (SwRI) (2000-06-21). "Discovery of Companions to Asteroids 762 Pulcova and 90 Antiope by Direct Imaging". SwRI. Retrieved 2009-10-21.