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7870 (1987 UP2)
Classification: Mars-crossing Asteroid          SPK-ID: 2007870
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2735436944834482 5.325e-08  
a 2.240862495489895 8.0808e-09 au
q 1.62788868964419 1.1759e-07 au
i 3.50567990603223 5.273e-06 deg
node 240.0484891107437 7.8867e-05 deg
peri 156.4220510889203 7.9331e-05 deg
M 199.3738361162265 9.0126e-06 deg
tp 2458147.182316105385
(2018-Jan-28.68231611)
3.1674e-05 JED
period 1225.240203957956
3.35
6.6275e-06
1.815e-08
d
yr
n .2938199373780535 1.5893e-09 deg/d
Q 2.8538363013356 1.0291e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1280  
   data-arc span      23960 days (65.60 yr)  
   first obs. used      1950-09-12  
   last obs. used      2016-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51426  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:00:26  

Additional Information
 Earth MOID = .634431 au 
 Jupiter MOID = 2.57887 au 
 T_jup = 3.582 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO365343  
rotation period rot_per 12. h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]

7870 (1987 UP2)          Discovered 1987-Oct-25 by Jensen, P. at Brorfelde
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1987 UP2 = 1950 RF = 1980 OK = 1987 WD1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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