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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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2724830918304932 5.69e-08  
a 2.241334798496535 1.0193e-08 AU
q 1.630608962774924 1.2724e-07 AU
i 3.503006788604484 5.9581e-06 deg
node 240.1532487193852 0.00010979 deg
peri 156.3058217318191 0.00011042 deg
M 23.23193779749106 1.5182e-05 deg
tp 2456921.406378139383
(2014-Sep-20.90637814)
5.1408e-05 JED
period 1225.627587247462
3.36
8.3604e-06
2.289e-08
d
yr
n .2937270699075033 2.0036e-09 deg/d
Q 2.852060634218147 1.297e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      960  
   data-arc span      23389 days (64.04 yr)  
   first obs. used      1950-09-12  
   last obs. used      2014-09-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54613  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:11:09  

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 Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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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