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9538 (1982 UM2)
Classification: Main-belt Asteroid          SPK-ID: 2009538
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1393118616617278 2.1631e-07  
a 2.523256306589237 1.12e-08 au
q 2.171736773068595 5.447e-07 au
i 2.269503633641452 6.7324e-06 deg
node 158.8213871477044 0.00017368 deg
peri 250.7749904702301 0.00018589 deg
M 97.34125690960967 5.454e-05 deg
tp 2457004.646100995644
(2014-Dec-13.14610100)
0.000222 JED
period 1463.997981594789
4.01
9.7478e-06
2.669e-08
d
yr
n .2459019783673734 1.6373e-09 deg/d
Q 2.87477584010988 1.2761e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1433  
   data-arc span      22277 days (60.99 yr)  
   first obs. used      1954-12-21  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51468  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:11:00  

Additional Information
 Earth MOID = 1.18205 au 
 Jupiter MOID = 2.48787 au 
 T_jup = 3.440 
[ 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 13.7 mag n/a MPO299031  
rotation period rot_per 21.9952 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

9538 (1982 UM2)          Discovered 1982-Oct-20 by Mrkos, A. at Klet
Reference: 19981110/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1982 UM2 = 1986 VH 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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