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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09111217137172528 7.5081e-08  
a 2.963591399294389 2.9752e-08 au
q 2.693572151846107 2.2875e-07 au
i .2366370948140577 7.4903e-06 deg
node 131.6567143518351 0.0019788 deg
peri 276.0707902612883 0.0019795 deg
M 216.3326040037572 5.4589e-05 deg
tp 2459744.172350496817
(2022-Jun-13.67235050)
0.0002896 TDB
period 1863.485060910101
5.10
2.8062e-05
7.683e-08
d
yr
n .193186415899777 2.9091e-09 deg/d
Q 3.233610646742671 3.2463e-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 = 1.70338 au 
 Jupiter MOID = 2.09142 au 
 T_jup = 3.259 
[ 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-August); 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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