1139 Atami
| Discovery [1] | |
|---|---|
| Discovered by |
O. Oikawa K. Kubokawa |
| Discovery site | Tokyo Astronomical Obs. (389) |
| Discovery date | 1 December 1929 |
| Designations | |
| MPC designation | (1139) Atami |
Named after | Atami (Japanese city)[2] |
| 1929 XE | |
| Mars-crosser [1][3][4] | |
| Orbital characteristics [1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 87.10 yr (31,814 days) |
| Aphelion | 2.4447 AU |
| Perihelion | 1.4502 AU |
| 1.9474 AU | |
| Eccentricity | 0.2553 |
| 2.72 yr (993 days) | |
| 38.329° | |
| 0° 21m 45.72s / day | |
| Inclination | 13.086° |
| 213.35° | |
| 206.57° | |
| Known satellites | 1 [5] |
| Earth MOID | 0.4720 AU · 183.8 LD |
| Physical characteristics | |
| Dimensions | 9.35 km (calculated)[4] |
|
15 h[6] 20 h[7] 24 h[8] 27.446±0.001 h[8] 27.45±0.01 h[8] 27.45±0.05 h[8] 27.472±0.002 h[8] 27.56±0.01 h[9] | |
| 0.20 (assumed)[4] | |
|
B–V = 0.920[1] U–B = 0.497[1] S (Tholen) · S (SMASS) S [4][10] | |
| 12.51[1][4] · 12.59±0.37[10] · 12.86±0.02[6] | |
|
| |
1139 Atami, provisional designation 1929 XE, is a binary[5] asteroid and Mars-crosser, approximately 9 kilometers in diameter. It was discovered on 1 December 1929, by Japanese astronomers Okuro Oikawa and Kazuo Kubokawa at the Tokyo Astronomical Observatory (389) near Tokyo.[3]
The stony S-type asteroid orbits the Sun at a distance of 1.5–2.4 AU once every 2 years and 9 months (993 days). Its orbit has an eccentricity of 0.26 and an inclination of 13° with respect to the ecliptic.[1]
In 2005, two rotational light-curves obtained at the U.S. Antelope Hills Observatory in New Mexico and by a collaboration of several European astronomers gave a rotation period of 27.56±0.01 and 27.446±0.001 hours with a brightness variation of 0.45 and 0.40 in magnitude, respectively (U=3/3).[8][9]
The minor planet was named after Atami, a Japanese city and harbor near Tokyo, Japan.[2] Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 106).[2]
Binary system
Photometric and Arecibo echo spectra observations in 2005 confirmed a 5 kilometer satellite orbiting at least 15 kilometers from its primary.[5] Due to the similar size of the primary and secondary the Minor Planet Center lists this as a binary companion.[11]
References
- 1 2 3 4 5 6 7 "JPL Small-Body Database Browser: 1139 Atami (1929 XE)" (2017-01-07 last obs.). Jet Propulsion Laboratory. Retrieved 7 February 2017.
- 1 2 3 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1139) Atami. Springer Berlin Heidelberg. p. 96. ISBN 978-3-540-00238-3. Retrieved 7 February 2017.
- 1 2 "1139 Atami (1929 XE)". Minor Planet Center. Retrieved 7 February 2017.
- 1 2 3 4 5 "LCDB Data for (1139) Atami". Asteroid Lightcurve Database (LCDB). Retrieved 7 February 2017.
- 1 2 3 "Electronic Telegram No. 430". IAU Central Bureau for Astronomical Telegrams. 2006-03-14. Retrieved 7 February 2017.
- 1 2 Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference. Bibcode:1995LPI....26.1511W. Retrieved 22 August 2016.
- ↑ Lupishko, D. F.; Velichko, F. P.; Shevchenko, V. G. (June 1988). "Photometry of the AMOR type asteroids 1036 Ganymede and 1139 Atami". Astronomicheskii Vestnik: 167–173.InRussian. Bibcode:1988AVest..22..167L. ISSN 0320-930X. Retrieved 22 August 2016.
- 1 2 3 4 5 6 Behrend, Raoul. "Asteroids and comets rotation curves – (1139) Atami". Geneva Observatory. Retrieved 7 February 2017.
- 1 2 Koff, Robert A. (June 2006). "Lightcurves of asteroids 141 Lumen, 259 Alatheia, 363 Padua, 455 Bruchsalia 514 Armida, 524 Fidelio, and 1139 Atami". The Minor Planet Bulletin. 33 (2): 31–33. Bibcode:2006MPBu...33...31K. ISSN 1052-8091. Retrieved 22 August 2016.
- 1 2 Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. Bibcode:2015Icar..261...34V. arXiv:1506.00762
. doi:10.1016/j.icarus.2015.08.007. Retrieved 22 August 2016. - ↑ "Satellites and Companions of Minor Planets". IAU Central Bureau for Astronomical Telegrams. 2009-09-17. Retrieved 7 February 2017.
External links
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- 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
- 1139 Atami at the JPL Small-Body Database
