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JPL Small-Body Database Browser
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27980 (1997 UA21)
Classification: Main-belt Asteroid          SPK-ID: 2027980
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08645328720020436 4.1346e-08  
a 2.575048029625408 1.4136e-08 au
q 2.352426662765882 1.0318e-07 au
i 9.593201513304532 4.9017e-06 deg
node 209.7014228489323 2.5609e-05 deg
peri 92.7700108617509 4.1255e-05 deg
M 131.3331937156974 3.58e-05 deg
tp 2458049.884500519605
(2017-Oct-23.38450052)
0.00014833 TDB
period 1509.302973641537
4.13
1.2428e-05
3.403e-08
d
yr
n .2385206988172945 1.9641e-09 deg/d
Q 2.797669396484934 1.5358e-08 au
  Orbit Determination Parameters
   # obs. used (total)      956  
   data-arc span      9513 days (26.05 yr)  
   first obs. used      1993-10-22  
   last obs. used      2019-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52996  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 01:10:17  

Additional Information
 Earth MOID = 1.361 au 
 Jupiter MOID = 2.3767 au 
 T_jup = 3.403 
[ 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 14.9   n/a MPO416986  

27980 (1997 UA21)          Discovered 1997-Oct-27 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 UA21 = 1996 HS13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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