Gaspra (planetka)
| Gaspra | |
|---|---|
 | |
| Identifikátory | |
| Typ | planetka |
| Označení | (951) Gaspra |
| Předběžné označení | 1916 S45 |
| Katalogové číslo | 951 |
| Objeveno | |
| Datum | 30. července 1916 |
| Místo | Simeis |
| Objevitel | Grigorij Nikolajevič Neujmin |
| Jméno po | Gaspra |
| Elementy dráhy (Ekvinokcium J2000,0) | |
| Velká poloosa | 2,2097 au |
| Výstřednost | 0,1737 |
| Perihel | 1,826 au |
| Afel | 2,594 au |
| Perioda (oběžná doba) | (3,285 a) |
| Sklon dráhy | |
| - k ekliptice | 4,1071° |
| Délka vzestupného uzlu | 253,0551° |
| Argument šířky perihelu | 129,9914° |
| Střední anomálie | 52,8243° |
| Fyzikální charakteristiky | |
| Absolutní hvězdná velikost | 11,46 |
(951) Gaspra je planetka hlavního pásu, podle materiálu je řazena do typu S. Byla pojmenována podle ukrajinského města Gaspra na Krymu. Krátery na Gaspře jsou pojmenovány podle lázeňských měst.
Má nepravidelný tvar o rozměrech 18×10×9 km a dobu rotace 7 h. Tepelná setrvačnost povrchu naměřená sondou Galileo potvrdila slabou, asi 1 metrů silné vrstvu regolitu. Objevil ji dne 30. července 1916 G.N. Neujmin. Gaspra má 600 pozorovaných kráterů, z toho největší z nich má průměr 1,5 km.
Dne 29. října 1991 ve 22:36:40 UT proletěla ve vzdálenosti 1600 kilometrů od Gaspry sonda Galileo. Gaspra je členem Flora rodiny asteroidů. Je složena ze směsi kamene a kovových minerálů.
Fotografie Gaspry pořízená sondou Galileo
Odkazy
Související články
- Seznam planetek 751-1000
Externí odkazy
Obrázky, zvuky či videa k tématu 951 Gaspra na Wikimedia Commons - (951) Gaspra na webu České astronomické společnosti
Média použitá na této stránce
951 Gaspra orbit on 01 Jan 2009.png
951 Gaspra orbit, and his position on 01 Jan 2009 (NASA Orbit Viewer applet)
951 Gaspra orbit, and his position on 01 Jan 2009 (NASA Orbit Viewer applet)
Gaspra rotation.jpg
A montage of images taken by the Galileo spacecraft as it flew by the asteroid Gaspra on October 29, 1991. It shows Gaspra growing progressively larger in the field of view of Galileo's solid-state imaging camera as the spacecraft approached the asteroid. Sunlight is coming from the right. The earliest view (upper left) was taken 5 3/4 hours before closest approach when the spacecraft was 164,000 kilometers (102,000 miles) from Gaspra, the last (lower right) at a range of 16,000 kilometers (10,000 miles), 30 minutes before closest approach. Gaspra spins once in roughly 7 hours, so these images capture almost one full rotation of the asteroid. Gaspra spins counterclockwise; its north pole is to the upper left, and the "nose" which points upward in the first image, is seen rotating back into shadow, emerging at lower left, and rotating to upper right.
A montage of images taken by the Galileo spacecraft as it flew by the asteroid Gaspra on October 29, 1991. It shows Gaspra growing progressively larger in the field of view of Galileo's solid-state imaging camera as the spacecraft approached the asteroid. Sunlight is coming from the right. The earliest view (upper left) was taken 5 3/4 hours before closest approach when the spacecraft was 164,000 kilometers (102,000 miles) from Gaspra, the last (lower right) at a range of 16,000 kilometers (10,000 miles), 30 minutes before closest approach. Gaspra spins once in roughly 7 hours, so these images capture almost one full rotation of the asteroid. Gaspra spins counterclockwise; its north pole is to the upper left, and the "nose" which points upward in the first image, is seen rotating back into shadow, emerging at lower left, and rotating to upper right.
Galileo Gaspra Mosaic.jpg
This picture of asteroid 951 Gaspra is a mosaic of two images taken by the Galileo spacecraft from a range of 5,300 kilometers (3,300 miles), some 10 minutes before closest approach on October 29, 1991.
This picture of asteroid 951 Gaspra is a mosaic of two images taken by the Galileo spacecraft from a range of 5,300 kilometers (3,300 miles), some 10 minutes before closest approach on October 29, 1991.