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==Orbit== |
==Orbit== |
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With an [[orbital period]] of 364.3 days, {{mp|1998 UP|1}} is in a near 1:1 orbital resonance with Earth. Although their periods are almost identical, their orbits are very different; {{mp|1998 UP|1}} has a highly eccentric orbit and moves between 0.65 – 1.35 [[Astronomical unit|AU]] from the Sun, it is also very highly inclined at 33[[Degree (angle)|°]].<ref name=jpldata/> The preliminary period of {{mp|1998 UP|1}} was originally thought to be slightly longer than 1 year<ref name="MPEC1998-U17"/> producing an error in the predicted position of about 35 degrees; it was selected as a priority for recovery and recovered by the [[Camarillo Observatory]] on 12 October 1999.<ref name=recovery>{{Cite journal |
With an [[orbital period]] of 364.3 days, {{mp|1998 UP|1}} is in a near 1:1 orbital resonance with Earth. Although their periods are almost identical, their orbits are very different; {{mp|1998 UP|1}} has a highly eccentric orbit and moves between 0.65 – 1.35 [[Astronomical unit|AU]] from the Sun, it is also very highly inclined at 33[[Degree (angle)|°]].<ref name=jpldata/> The preliminary period of {{mp|1998 UP|1}} was originally thought to be slightly longer than 1 year<ref name="MPEC1998-U17"/> producing an error in the predicted position of about 35 degrees; it was selected as a priority for recovery and recovered by the [[Camarillo Observatory]] on 12 October 1999.<ref name=recovery>{{Cite journal|title=Coordinated Amateur Recovery of One-Opposition NEAs |last=Rogers |first=John E. |publisher=[[Camarillo Observatory]] |url=http://www.camarilloobservatory.com/Campaigns/670Paper.ps |deadurl=yes |archiveurl=https://web.archive.org/20070221033552/http://www.camarilloobservatory.com:80/campaigns/670Paper.ps |archivedate=February 21, 2007 }}</ref> |
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{{mp|1998 UP|1}} also makes close approaches to Venus and will pass {{convert|0.0255|AU|km mi|abbr=on|lk=off}} from Venus on 24 January 2115.<ref name=jpl-close/> |
{{mp|1998 UP|1}} also makes close approaches to Venus and will pass {{convert|0.0255|AU|km mi|abbr=on|lk=off}} from Venus on 24 January 2115.<ref name=jpl-close/> |
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Revision as of 03:33, 6 September 2015
| Discovery[1][2] | |
|---|---|
| Discovered by | 1998-10-18 by LINEAR |
| Discovery site | Socorro |
| Designations | |
| (85770) | |
Aten  | |
| Orbital characteristics[2] | |
| Epoch 2457000.5 (2014-Dec-09) | |
| Aphelion | 1.3426 AU |
| Perihelion | 0.65378 AU |
| 0.99818 AU | |
| Eccentricity | 0.34503 (14,000 w.r.t. Earth) |
| 364.26 d 1.00 yr | |
| 158.55° | |
| Inclination | 33.18° |
| 18.363° | |
| 234.29° | |
| Physical characteristics | |
| Dimensions | 210–470 meters[3] |
| 20.5[2] | |
1998 UP1 is a near Earth, Aten asteroid orbiting at nearly a 1:1 resonance with Earth.
Orbit
With an orbital period of 364.3 days, 1998 UP1 is in a near 1:1 orbital resonance with Earth. Although their periods are almost identical, their orbits are very different; 1998 UP1 has a highly eccentric orbit and moves between 0.65 – 1.35 AU from the Sun, it is also very highly inclined at 33°.[2] The preliminary period of 1998 UP1 was originally thought to be slightly longer than 1 year[1] producing an error in the predicted position of about 35 degrees; it was selected as a priority for recovery and recovered by the Camarillo Observatory on 12 October 1999.[4]
1998 UP1 also makes close approaches to Venus and will pass 0.0255 AU (3,810,000 km; 2,370,000 mi) from Venus on 24 January 2115.[5]
References
- ^ a b "MPEC 1998-U17 : 1998 UP1". IAU Minor Planet Center. 1998-10-21. Retrieved 2015-02-28. (J98U01P)
- ^ a b c d "JPL Small-Body Database Browser: 85770 (1998 UP1)" (last observation: 2014-11-02; arc: 24 years). Jet Propulsion Laboratory. Retrieved 2015-02-28.
- ^ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2015-02-28.
- ^ Rogers, John E. "Coordinated Amateur Recovery of One-Opposition NEAs". Camarillo Observatory. Archived from the original on February 21, 2007.
{{cite journal}}: Cite journal requires|journal=(help); Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ "JPL Close-Approach Data: 85770 (1998 UP1)" (last observation: 2014-11-02; arc: 24 years). Retrieved 2015-02-28.
External links