(185851) 2000 DP107
 Composite of radar images by the Arecibo Observatory from September to October 2000 | |
| Discovery[1] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 29 February 2000 |
| Designations | |
| (185851) 2000 DP107 | |
| 2000 DP107 | |
| NEO · PHA · Apollo[1][2] | |
| Orbital characteristics[2] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 16.82 yr (6,143 days) |
| Aphelion | 1.8794 AU |
| Perihelion | 0.8511 AU |
| 1.3652 AU | |
| Eccentricity | 0.3766 |
| 1.60 yr (583 days) | |
| 255.78° | |
| 0° 37m 4.44s / day | |
| Inclination | 8.6718° |
| 358.70° | |
| 289.74° | |
| Known satellites | 1 |
| Earth MOID | 0.0150 AU · 5.8 LD |
| Physical characteristics | |
| Dimensions | 0.860 km (taken)[3] 0.863±0.043 km[4] 1.0±0.1 km[5] |
| 2.769±0.005 h[6] 2.774±0.001 h[7] 2.77447±0.00005 h[8] 2.7745±0.0007 h[4] 2.7754±0.0002 h[9] 2.7754 h[10] | |
| 0.111±0.036[5] 0.15 (derived)[3] | |
| M[11] · C[3][12] | |
| 18.0[10] · 18.0±0.2 (R)[6] · 18.02±0.2[3][13] · 18.03±0.1[5] · 18.2[2] | |
(185851) 2000 DP107 is a sub-kilometer sized asteroid, classified as potentially hazardous asteroid and near-Earth object of the Apollo group that is notable because it provided evidence for binary asteroids in the near-Earth population. The PROCYON probe developed by JAXA and the University of Tokyo was intended to flyby this asteroid before its ion thruster failed and could not be restarted.
Discovery
[edit]The asteroid was discovered on 29 February 2000, by the Lincoln Near-Earth Asteroid Research (LINEAR) program at Lincoln Laboratory's Experimental Test Site, near Socorro, New Mexico.[1]
The binary nature of this asteroid was suggested from radar observations taken with the Goldstone radar antenna on September 22 and 23, 2000, based on an observing proposal by J.-L. Margot and observations by S. J. Ostro and colleagues.[14] Confirming observations were obtained with the Arecibo telescope from September 30 to October 7, 2000.[15]
Orbit
[edit]2000 DP107 orbits the Sun at a distance of 0.9–1.9 AU once every 19 months (583 days). Its orbit has an eccentricity of 0.38 and an inclination of 9° with respect to the ecliptic.[2] The body's observation arc begins with its official discovery observation, as no precoveries were taken, and no prior identifications were made.[1]
Binary system
[edit]The 800-meter-diameter primary and the 300-meter-diameter secondary orbit each other with a separation of 2.6 kilometers and a period of 1.76 days.[16]
The primary is spheroidal and is spinning at a rate near the breakup point for strengthless bodies. These two features were observed in multiple binary systems, suggesting that near-Earth asteroid binaries form by a mechanism involving spin-up and mass shedding.[16] Currently the most generally accepted spin-up mechanism is the YORP effect.
Physical characteristics
[edit]The asteroid is characterized as both a carbonaceous C-type[12] and metallic M-type asteroid.[11]
The density of the primary was calculated using the orbital elements of the binary system, the primary-to-secondary mass ratio, and estimates of the primary size. The primary has a low density of 1.7 g/cm3, which may indicate a "rubble pile" structure containing rocks and voids.
Numbering and naming
[edit]This minor planet was numbered by the Minor Planet Center on 20 May 2008.[17] As of 2018, it has not been named.[1]
See also
[edit]References
[edit]- ^ a b c d e "185851 (2000 DP107)". Minor Planet Center. Retrieved 22 March 2017.
- ^ a b c d "JPL Small-Body Database Browser: 185851 (2000 DP107)" (2016-12-24 last obs.). Jet Propulsion Laboratory. Archived from the original on 23 March 2017. Retrieved 1 June 2017.
- ^ a b c d "LCDB Data for (185851)". Asteroid Lightcurve Database (LCDB). Retrieved 22 March 2017.
- ^ a b Naidu, S. P.; Margot, J. L.; Taylor, P. A.; Nolan, M. C.; Busch, M. W.; Benner, L. A. M.; et al. (August 2015). "Radar Imaging and Characterization of the Binary Near-Earth Asteroid (185851) 2000 DP107". The Astronomical Journal. 150 (2): 12. arXiv:1503.01743. Bibcode:2015AJ....150...54N. doi:10.1088/0004-6256/150/2/54. S2CID 85535751.
- ^ a b c Marchis, F.; Enriquez, J. E.; Emery, J. P.; Mueller, M.; Baek, M.; Pollock, J.; et al. (November 2012). "Multiple asteroid systems: Dimensions and thermal properties from Spitzer Space Telescope and ground-based observations". Icarus. 221 (2): 1130–1161. arXiv:1604.05384. Bibcode:2012Icar..221.1130M. doi:10.1016/j.icarus.2012.09.013. S2CID 161887.
- ^ a b Polishook, David (July 2012). "Lightcurves and Spin Periods of Near-Earth Asteroids, The Wise Observatory, 2005 - 2010". The Minor Planet Bulletin. 39 (3): 187–192. Bibcode:2012MPBu...39..187P. ISSN 1052-8091.
- ^ Skiff, Brian A.; Bowell, Edward; Koehn, Bruce W.; Sanborn, Jason J.; McLelland, Kyle P.; Warner, Brian D. (July 2012). "Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS) - 2008 May through 2008 December". The Minor Planet Bulletin. 39 (3): 111–130. Bibcode:2012MPBu...39..111S. ISSN 1052-8091.
- ^ Warner, Brian D.; Stephens, Robert D. (April 2009). "Lightcurve Analysis of Two Binary Asteroids: (76818) 2000 RG79 and (185851) 2000 DP107". The Minor Planet Bulletin. 36 (2): 62–63. Bibcode:2009MPBu...36...62W. ISSN 1052-8091.
- ^ Pravec, P.; Kusnirak, P.; Hicks, M.; Holliday, B.; Warner, B. (October 2000). "2000 DP_107". IAU Circ. 7504 (7504): 3. Bibcode:2000IAUC.7504....3P.
- ^ a b Pravec, P.; Scheirich, P.; Kusnirák, P.; Sarounová, L.; Mottola, S.; Hahn, G.; et al. (March 2006). "Photometric survey of binary near-Earth asteroids". Icarus. 181 (1): 63–93. Bibcode:2006Icar..181...63P. doi:10.1016/j.icarus.2005.10.014.
- ^ a b Yang, B.; Zhu, J.; Gao, J.; Zhang, H. T.; Zheng, X. Z. (May 2003). "Observations of 2000 DP 107 in NAOC: rotation period and reflectance spectrum". Planetary and Space Science. 51 (6): 411–414. Bibcode:2003P&SS...51..411Y. doi:10.1016/S0032-0633(03)00024-2.
- ^ a b Dandy, C. L.; Fitzsimmons, A.; Collander-Brown, S. J. (June 2003). "Optical colors of 56 near-Earth objects: trends with size and orbit". Icarus. 163 (2): 363–373. Bibcode:2003Icar..163..363D. doi:10.1016/S0019-1035(03)00087-3.
- ^ Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026.
- ^ IAUC 7496: 2000 S1; 2000 DP107
- ^ IAUC 7503: 2000dp; Sats of minor planets
- ^ a b Margot, J. L.; Nolan, M. C.; Benner, L. A. M.; Ostro, S. J.; Jurgens, R. F.; Giorgini, J. D.; et al. (May 2002). "Binary Asteroids in the Near-Earth Object Population". Science. 296 (5572): 1445–1448. Bibcode:2002Sci...296.1445M. doi:10.1126/science.1072094. PMID 11951001. S2CID 8768432.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 February 2018.
External links
[edit]- Lightcurve plot of (185851) 2000 DP107, Palmer Divide Observatory, B. D. Warner (2008)
- 2000 DP107
- Arecibo Planetary Science website
- Binary Asteroids in the Near-Earth Object Population, Margot et al., Science, 2002 (subscription)
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- (185851) 2000 DP107 at NeoDyS-2, Near Earth Objects—Dynamic Site
- (185851) 2000 DP107 at ESA–space situational awareness
- (185851) 2000 DP107 at the JPL Small-Body Database
