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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2724831023564149 5.3572e-08  
a 2.241334795362789 8.3128e-09 AU
q 1.630608936902955 1.1816e-07 AU
i 3.503009406002188 5.4858e-06 deg
node 240.1532075901133 8.397e-05 deg
peri 156.3058586165247 8.4522e-05 deg
M 23.2319444552769 9.3386e-06 deg
tp 2456921.406355638689
(2014-Sep-20.90635564)
3.1739e-05 JED
period 1225.627584677026
3.36
6.8185e-06
1.867e-08
d
yr
n .2937270705235199 1.6341e-09 deg/d
Q 2.852060653822622 1.0578e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1131  
   data-arc span      23613 days (64.65 yr)  
   first obs. used      1950-09-12  
   last obs. used      2015-05-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52105  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:59:46  

Additional Information
 Earth MOID = .638337 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 13.7 mag n/a MPO265999  
rotation period rot_per 12. h n/a LCDB (Rev. 2015-May); 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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