_1998_RO1.gif) Orbit of1998 RO1 | |
| Discovery[1][2] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 14 September 1998 |
| Designations | |
| (66063)1998 RO1 | |
| 1998 RO1 · 1999 SN5 | |
| NEO · Aten[1] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 13.99 yr (5,111 days) |
| Aphelion | 1.7045AU |
| Perihelion | 0.2774 AU |
| 0.9910 AU | |
| Eccentricity | 0.7200 |
| 0.99yr (360 days) | |
| 348.97° | |
| 0° 59m 56.76s / day | |
| Inclination | 22.678° |
| 351.88° | |
| 151.13° | |
| Knownsatellites | 1(D: 0.38 km;P: 14.53 h)[3][4][5][6] |
| Earth MOID | 0.0921 AU · 35.9LD |
| Physical characteristics | |
| 0.62±0.25 km[7] 0.72 km(est. at0.20)[8] 0.8±0.15 km[3][9] 0.860 km(derived)[10] | |
Meandensity | 2.8±1.3 g/cm3[6] |
| 2.4924±0.0003h[4] 2.4924 h[5][9] | |
| 0.145[9] 0.30±0.17[7] | |
| S[10][11][12] | |
| 18.00[12] · 18.04[9] · 18.05[10] · 18.05±0.071[13] · 18.1[1] | |
(66063) 1998 RO1 is a stonynear-Earth object of theAten group on a highly-eccentric orbit. The synchronousbinary system measures approximately 800 meters (0.50 miles) in diameter. It was discovered by astronomers of theLincoln Near-Earth Asteroid Research at theLincoln Laboratory's Experimental Test Site near Socorro, New Mexico, on 14 September 1998.[2]
It has oneminor-planet moon, discovered in September 2003. It has anorbital period of 14.53 hours and measures approximately 48% of its primary, or 380 meters.[1][3] It is one ofseven known Aten binaries as of 2017.
1998 RO1's orbit is very eccentric, with anaphelion beyond the orbit ofMars and a perihelion inside the orbit ofMercury.[3] It has anorbital period of 360.29 days (0.99 years) and makes close approaches to Earth.[1] But1998 RO1 makes closer approaches to other inner planets, especially Mars. Its closest approach to a planet between 1950–2200 was to Mars, as it passed 0.00898 AU (1,343,000 km) from Mars on 18 March 1964, and will pass 0.0054 AU (810,000 km) from Mars on 12 October 2065.[1]
1998 RO1 has one unnamednatural satellite.[1] The satellite was discovered from lightcurve observations going from 13 to 28 September 2013, and was confirmed by radar observations from theArecibo Observatory one year later. It is in a very close orbit to1998 RO1, with a semi-major axis of 800 m (2,600 ft) and an eccentricity of 0.06,[3] giving it a periapsis of 752 m (2,467 ft) and an apoapsis of 848 m (2,782 ft). The satellite takes 14.54 hours to complete one orbit around1998 RO1.[3]
Thisminor planet wasnumbered by theMinor Planet Center on 10 September 2003.[14] As of 2018, it has not beennamed.[2]
