699 Hela
699 Hela is a Mars crossing asteroid. With an absolute magnitude of 11.7,[2] the asteroid is about 12–27 km in diameter.[3]
.png.webp) Lightcurve-based 3D-model of Hela | |
| Discovery | |
|---|---|
| Discovered by | J. Helffrich |
| Discovery site | Heidelberg |
| Discovery date | 5 June 1910 |
| Designations | |
| (699) Hela | |
| Pronunciation | /ˈhiːlə/[1] |
| 1910 KD | |
| Mars crosser[2] | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 113.38 yr (41411 d) |
| Aphelion | 3.6831 AU (550.98 Gm) |
| Perihelion | 1.5414 AU (230.59 Gm) |
| 2.6123 AU (390.79 Gm) | |
| Eccentricity | 0.40995 |
| 4.22 yr (1542.1 d) | |
| 3.93957° | |
| 0° 14m 0.384s / day | |
| Inclination | 15.297° |
| 242.548° | |
| 91.479° | |
| Earth MOID | 0.62609 AU (93.662 Gm) |
| Mars MOID | 0.4063 AU (60.78 Gm) |
| Jupiter MOID | 2.10581 AU (315.025 Gm) |
| TJupiter | 3.239 |
| Physical characteristics | |
| Dimensions | 12 - 27 km[3] |
| 3.3962 h (0.14151 d)[2] | |
| 11.72[2] | |
References
- Noah Webster (1884) A Practical Dictionary of the English Language
- "JPL Small-Body Database Browser: 699 Hela (1910 KD)". Jet Propulsion Laboratory. Retrieved 7 May 2016.
- "Absolute Magnitude (H)". NASA/JPL. Retrieved 24 June 2014.
External links
- Lightcurve plot of 699 Hela, Palmer Divide Observatory, B. D. Warner (1999)
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 699 Hela at AstDyS-2, Asteroids—Dynamic Site
- 699 Hela at the JPL Small-Body Database
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