(9681) Sherwoodrowland
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Asteroid (9681) Sherwoodrowland |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Asteroid family | Eos family |
| Major semi-axis | 3.0814 AU |
| eccentricity | 0.0455 |
| Perihelion - aphelion | 2.9412 AU - 3.2215 AU |
| Inclination of the orbit plane | 9.0687 ° |
| Length of the ascending node | 202.6098 ° |
| Argument of the periapsis | 354.2629 ° |
| Sidereal period | 5.41 a |
| Mean orbital velocity | 16.97 km / s |
| Physical Properties | |
| Absolute brightness | 13.4 mag |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | September 24, 1960 |
| Another name | 4069 PL , 1974 HQ |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(9681) Sherwoodrowland is an asteroid of the main outer belt that was discovered on September 24, 1960 by the Dutch astronomer couple Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld . The discovery came about as part of the Palomar-Leiden survey , during which Tom Gehrels examined field plates recorded at the University of Leiden with the 120 cm Oschin Schmidt telescope of the Palomar observatory .
The asteroid belongs to the Eos family , a group of asteroids which typically have large semiaxes from 2.95 to 3.1 AU , bounded inward by the Kirkwood gap of the 7: 3 resonance with Jupiter , and orbital inclinations between 8 ° and 12 °. The group is named after the asteroid (221) Eos . The family is believed to have emerged from a collision more than a billion years ago.
The timeless (non- osculating ) orbital elements of (9681) Sherwoodrowland are almost identical to those of nine smaller ones, if one considers the absolute brightness of 14.4, 14.4, 14.5, 15.1, 14.6, 14, 5, 14.6, 15.7 and 16.0 compared to 13.4, asteroids: (10173) Hanzelkazigmund , (72853) 2001 HE 42 , (91821) 2001 TN 277 , (159524) 2001 FO 96 (163541) 2002 TC 77 , (192211) 2007 KO 3 , (195771) 2002 PK 131 , (255174) 2005 UL 226 and (313910) 2004 PO 63 .
(9681) Sherwoodrowland is named after the American chemist Frank Sherwood Rowland who, together with Paul J. Crutzen and Mario J. Molina , received the Nobel Prize for Chemistry in 1995 for work on the chemistry of the earth's atmosphere , especially on the formation and depletion of ozone . The asteroid was named on November 11, 2000. The asteroid of the inner main belt (9679) was named after Paul J. Crutzen on the same day, and the asteroid of the inner main belt (9680) was named after Mario J. Molina on November 11, 2000. Molina .
Web links
- (9681) Sherwoodrowland in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (9681) Sherwoodrowland in the Small-Body Database of the Jet Propulsion Laboratory of NASA at the California Institute of Technology (Caltech) in Pasadena , California (English)
- Discovery Circumstances of (9681) Sherwoodrowland according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ David Vokrouhlický , Miroslav Brož , Alessandro Morbidelli , William Bottke , David Nesvorný , Daniel Lazzaro, Andy Rivkin: Yarkovsky footprints in the Eos family ( PDF , English)
- ↑ The family status of the asteroids in the AstDyS-2 database (English, HTML; 51.4 MB)