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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 ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1398799506134569 2.1481e-07  
a 2.522532520555617 1.0689e-08 au
q 2.169680796159458 5.4053e-07 au
i 2.270291686554327 6.4405e-06 deg
node 158.8291290192743 0.0001442 deg
peri 250.7573305919113 0.00015826 deg
M 146.4903830170909 5.4017e-05 deg
tp 2457005.029568106466
(2014-Dec-13.52956811)
0.00021981 JED
period 1463.368113773461
4.01
9.3017e-06
2.547e-08
d
yr
n .2460078203232808 1.5637e-09 deg/d
Q 2.875384244951776 1.2185e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1630  
   data-arc span      22391 days (61.30 yr)  
   first obs. used      1954-12-21  
   last obs. used      2016-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50961  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:05:41  

Additional Information
 Earth MOID = 1.17963 au 
 Jupiter MOID = 2.48606 au 
 T_jup = 3.441 
[ 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. 2016-February); 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. (2016) 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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