Back Tempel 1 Afrikaans تيمبل 1 (مذنب) Arabic Cometa Tempel 1 Catalan 9P/Tempel Czech 9P/Tempel 1 German Τέμπελ 1 Greek Kometo Tempel 1 Esperanto 9P/Tempel 1 Spanish 9P/Tempel 1 Basque تمپل ۱ Persian
 Composite of images of nucleus obtained by the Deep Impact impactor | |
| Discovery | |
|---|---|
| Discovered by | Wilhelm Tempel |
| Discovery date | April 3, 1867 |
| Designations | |
| |
| Orbital characteristics | |
| Epoch | 2023-02-25[1] |
| Aphelion | 4.757 AU |
| Perihelion | 1.545 AU[1] (1.77 AU after 2024 Jupiter approach)[2][3] |
| Semi-major axis | 3.151 AU |
| Eccentricity | 0.5097 |
| Orbital period | 5.59 years (2,040 days) |
| Inclination | 10.474° |
| 68.64° | |
| Argument of periapsis | 179.54° |
| Last perihelion | March 4, 2022[1] August 2, 2016[1] |
| Next perihelion | 2028-Feb-12[3] |
| Earth MOID | 0.52 AU (78 million km) |
| Physical characteristics | |
| Dimensions | 7.6 km × 4.9 km (4.7 mi × 3.0 mi)[4][5] |
| Mass | 7.2×1013 to 7.9×1013 kg[5][6] |
Mean density | 0.62 g/cm3[7] |
| 40.7 hours[4] | |
Tempel 1 (official designation: 9P/Tempel) is a periodic Jupiter-family comet discovered by Wilhelm Tempel in 1867. It completes an orbit of the Sun every 5.6 years. Tempel 1 was the target of the Deep Impact space mission, which photographed a deliberate high-speed impact upon the comet in 2005. It was re-visited by the Stardust spacecraft on February 14, 2011, and came back to perihelion in August 2016. On 26 May 2024, it will make a modest approach of 0.55 AU to Jupiter[4][2] which will lift the perihelion distance and 9P will next come to perihelion on 12 February 2028 when it will be 1.77 AU from the Sun.[3]
- ^ a b c d MPC
- ^ a b Cite error: The named reference
cometographywas invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
Horizons2028was invoked but never defined (see the help page). - ^ a b c "JPL Small-Body Database Browser: 9P/Tempel 1" (2023-01-03 last obs). Retrieved 2008-12-16.
- ^ a b "Comet 9P/Tempel 1". The Planetary Society. Archived from the original on 2006-02-09. Retrieved 2008-12-16.
- ^ Using a spherical diameter of 6.25 km; volume of a sphere * a rubble pile density of 0.62 g/cm3 yields a mass (m=d*v) of 7.9E+13 kg
- ^ D. T. Britt; G. J. Consol-magno SJ; W. J. Merline (2006). "Small Body Density and Porosity: New Data, New Insights" (PDF). Lunar and Planetary Science XXXVII. Retrieved 2008-12-16.
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