Astronomy:2017 DR109
| Discovery[1] | |
|---|---|
| Discovered by | Catalina Sky Srvy. |
| Discovery site | Mount Lemmon Obs. |
| Discovery date | 27 February 2017 |
| Designations | |
| 2017 DR109 | |
| Minor planet category | NEO · Apollo[1] · Aten[2] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 6 | |
| Observation arc | (5 days) |
| |{{{apsis}}}|helion}} | 1.2422 AU |
| |{{{apsis}}}|helion}} | 0.7591 AU |
| 1.0006 AU | |
| Eccentricity | 0.2414 |
| Orbital period | 1.00 yr (366 days) |
| Mean anomaly | 263.04° |
| Mean motion | 0° 59m 4.92s / day |
| Inclination | 3.0600° |
| Longitude of ascending node | 341.31° |
| 72.094° | |
| Earth MOID | 0.0062 AU (2.4 LD) |
| Physical characteristics | |
| Mean diameter | 9–20 m (estimate)[3][4][a] |
| Absolute magnitude (H) | 27.6[1] |
2017 DR109, is a micro-asteroid, classified as near-Earth object of the Apollo group and Aten group, respectively. It is currently trapped in a 1:1 mean motion resonance with the Earth of the horseshoe type.[5] The object was first observed on 27 February 2017, by astronomers of the Catalina Sky Survey conducted at Mount Lemmon Observatory, Arizona, United States.[2]
Discovery
2017 DR109 was first observed by astronomer D. C. Fuls on 27 February 2017, using the 0.68-meter Schmidt camera of the Catalina Sky Survey at a visual apparent magnitude of 19.6.[5]:6
Orbit and physical properties
The asteroid's orbit has still a high uncertainty; with a very short observation arc of just 5 days. It orbits the Sun at a distance of 0.76–1.24 AU once every 366 days (semi-major axis of 1.00 AU). Its orbit has an eccentricity of 0.24 and an inclination of 3° with respect to the ecliptic.[1] With a semi-major axis of that of Earth, the object is both classified as a member of Apollo and Aten in the JPL Small-Body Database and by the Minor Planet Center, respectively.[1][2] Both Apollo and Aten asteroids are Earth-crossing asteroids.
Earth co-orbital
2017 DR109 is currently trapped in a 1:1 mean motion resonance with the Earth of the horseshoe type and follows an orbit similar to those of 54509 YORP, 2017 FZ2 and several other near-Earth asteroids.[5]
Physical characteristics
2017 DR109 has an absolute magnitude of 27.6 which gives a calculated mean diameter between 9 and 20 meters for an assumed geometric albedo of 0.20 and 0.04, respectively, which are typical values for stony S-type and carbonaceous C-type asteroids.[3][4]
Notes
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: (2017 DR109)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3770320;cad=1. Retrieved 8 February 2018.
- ↑ 2.0 2.1 2.2 "2017 DR109". Minor Planet Center. http://www.minorplanetcenter.net/db_search/show_object?object_id=2017+DR109. Retrieved 8 February 2018.
- ↑ 3.0 3.1 "2017 DR109 – Summary". NEODyS-2, Near Earth Objects – Dynamic Site. https://newton.spacedys.com/neodys2/index.php?pc=1.1.0&n=2017+DR109. Retrieved 8 February 2018.
- ↑ 4.0 4.1 "Asteroid Size Estimator". CNEOS NASA/JPL. https://cneos.jpl.nasa.gov/tools/ast_size_est.html. Retrieved 8 February 2018.
- ↑ 5.0 5.1 5.2 de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (January 2018). "Asteroid 2017 FZ2 et al.: signs of recent mass-shedding from YORP?". Monthly Notices of the Royal Astronomical Society 473 (3): 3434–3453. doi:10.1093/mnras/stx2540. Bibcode: 2018MNRAS.473.3434D.
External links
- MPEC 2017-E31 : 2017 DR109, Minor Planet Electronic Circular
- List Of Apollo Minor Planets (by designation)
- 2017 DR109 at AstDys-2, Asteroids – Dynamic Site
- 2017 DR109 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- 2017 DR109 at ESA–space situational awareness
- 2017 DR109 at the JPL Small-Body Database
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