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15257 (1990 RQ8)
Classification: Main-belt Asteroid          SPK-ID: 2015257
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1704599400902267 7.2204e-08  
a 3.141601043622751 3.1252e-08 AU
q 2.606083917939423 2.2362e-07 AU
i 1.283762401590281 7.9474e-06 deg
node 8.050399540880184 0.00030306 deg
peri 323.1953976296022 0.00030339 deg
M 109.6131558761431 2.1636e-05 deg
tp 2456181.222706195089
(2012-Sep-10.72270619)
0.00012071 JED
period 2033.878360565385
5.57
3.0349e-05
8.309e-08
d
yr
n .1770017356888176 2.6411e-09 deg/d
Q 3.677118169306079 3.6579e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      679  
   data-arc span      8599 days (23.54 yr)  
   first obs. used      1990-09-15  
   last obs. used      2014-04-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .538  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 21:14:46  

Additional Information
 Earth MOID = 1.59439 AU 
 T_jup = 3.187 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9 mag n/a MPO247498  

15257 (1990 RQ8)          Discovered 1990-Sep-15 by Debehogne, H. at La Silla (809)
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 RQ8 = 1994 GE3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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