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129972 (1999 UF23)
Classification: Main-belt Asteroid          SPK-ID: 2129972
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1775641584252971 6.7968e-08  
a 2.627105483735316 1.3024e-08 au
q 2.160625709421371 1.8027e-07 au
i 13.20546489296696 7.5026e-06 deg
node 38.55602443565267 1.7894e-05 deg
peri 334.0413224535808 2.3998e-05 deg
M 317.385268636791 1.3755e-05 deg
tp 2459184.607697910978
(2020-Dec-01.10769791)
5.9738e-05 TDB
period 1555.301866930769
4.26
1.1566e-05
3.167e-08
d
yr
n .2314663202394424 1.7213e-09 deg/d
Q 3.093585258049261 1.5337e-08 au
  Orbit Determination Parameters
   # obs. used (total)      466  
   data-arc span      7602 days (20.81 yr)  
   first obs. used      1999-10-07  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50527  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:42:39  

Additional Information
 Earth MOID = 1.1702 au 
 Jupiter MOID = 2.38082 au 
 T_jup = 3.342 
[ 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 15.7   n/a MPO436630  
rotation period rot_per 11.16 h n/a LCDB (Rev. 2019-August); 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:
[Chang, C.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) ArXiv:1901.08719.]

129972 (1999 UF23)          Discovered 1999-Oct-31 by Spacewatch at Kitt Peak
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

Alternate Designations
 1999 UF23 = 1999 VH57 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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