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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2725289181912253 5.7261e-08  
a 2.241486993511241 1.2158e-08 AU
q 1.630616968029921 1.2854e-07 AU
i 3.502962174237202 6.0271e-06 deg
node 240.1547067480816 0.00011234 deg
peri 156.2882548781578 0.00011319 deg
M 324.4992028714668 1.9554e-05 deg
tp 2456921.375522832906
(2014-Sep-20.87552283)
6.7243e-05 JED
period 1225.752426411619
3.36
9.9727e-06
2.73e-08
d
yr
n .2936971546969704 2.3895e-09 deg/d
Q 2.852357018992562 1.5471e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      919  
   data-arc span      22942 days (62.81 yr)  
   first obs. used      1950-09-12  
   last obs. used      2013-07-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5546  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 19:06:20  

Additional Information
 Earth MOID = .637346 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. 2013-Sep-12) 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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