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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1699858972866056 7.2151e-08  
a 3.146440864990034 3.0069e-08 AU
q 2.611590291295459 2.2279e-07 AU
i 1.284371771219994 6.9189e-06 deg
node 7.945405332469926 0.00028969 deg
peri 323.9034573050614 0.00028998 deg
M 144.2482715760576 1.9929e-05 deg
tp 2456183.662053224447
(2012-Sep-13.16205322)
0.0001088 JED
period 2038.580134280151
5.58
2.9223e-05
8.001e-08
d
yr
n .1765934995374223 2.5315e-09 deg/d
Q 3.681291438684608 3.5181e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      855  
   data-arc span      8953 days (24.51 yr)  
   first obs. used      1990-09-15  
   last obs. used      2015-03-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52666  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:52:00  

Additional Information
 Earth MOID = 1.60183 AU 
 T_jup = 3.186 
[ 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
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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