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JPL Small-Body Database Browser
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173878 (2001 UN38)
Classification: Main-belt Asteroid          SPK-ID: 2173878
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09216214011966277 7.4646e-08  
a 2.960707518708639 2.9843e-08 au
q 2.687842377516074 2.2639e-07 au
i .2365682066245463 7.4897e-06 deg
node 131.6717360569602 0.0019809 deg
peri 276.2365993038184 0.0019816 deg
M 138.7855980981359 5.336e-05 deg
tp 2457883.145895898301
(2017-May-09.64589590)
0.00026982 TDB
period 1860.765677530918
5.09
2.8134e-05
7.703e-08
d
yr
n .1934687448006297 2.9252e-09 deg/d
Q 3.233572659901204 3.2593e-08 au
  Orbit Determination Parameters
   # obs. used (total)      283  
   data-arc span      21395 days (58.58 yr)  
   first obs. used      1960-09-26  
   last obs. used      2019-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56413  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 15:35:53  

Additional Information
 Earth MOID = 1.69718 au 
 Jupiter MOID = 2.09296 au 
 T_jup = 3.260 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO254222  
rotation period rot_per 2.974 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Masiero, J.; Jedicke, R.; Durecy, J.; Gwyn, S.; et al. (2009) Icarus 204, 145-171.]

173878 (2001 UN38)          Discovered 2001-Oct-17 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

Alternate Designations
 2001 UN38 = 1998 DY22 = 2006 SM81 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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