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9890 (1995 SY2)
Classification: Main-belt Asteroid          SPK-ID: 2009890
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1404603422961445 5.8349e-08  
a 2.17049814911814 1.3593e-08 au
q 1.865629236139858 1.3355e-07 au
i .7054316177674842 4.3775e-06 deg
node 89.98440798420167 0.00043775 deg
peri 281.2015356052204 0.00043815 deg
M 117.0484016206749 1.6901e-05 deg
tp 2457020.747585940095
(2014-Dec-29.24758594)
5.456e-05 JED
period 1167.985783390809
3.20
1.0972e-05
3.004e-08
d
yr
n .3082229296960062 2.8954e-09 deg/d
Q 2.475367062096422 1.5502e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1105  
   data-arc span      13234 days (36.23 yr)  
   first obs. used      1979-09-23  
   last obs. used      2015-12-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51305  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:12:16  

Additional Information
 Earth MOID = .863729 au 
 Jupiter MOID = 2.98002 au 
 T_jup = 3.676 
[ 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 14.8 mag n/a MPO358726  
rotation period rot_per 12.6249 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

9890 (1995 SY2)          Discovered 1995-Sep-20 by Ueda, S., Kaneda, H. at Kushiro
Reference: 19990106/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1995 SY2 = 1979 SG5 = 1992 VA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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