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JPL Small-Body Database Browser
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39771 (1997 GH21)
Classification: Main-belt Asteroid          SPK-ID: 2039771
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1210198537447394 3.8501e-08  
a 3.03858946483681 2.512e-08 au
q 2.670859812211953 1.1921e-07 au
i 9.719635436374823 4.6184e-06 deg
node 42.25346129595023 2.8242e-05 deg
peri 242.1116473231397 3.5038e-05 deg
M 75.16568247392112 2.0654e-05 deg
tp 2458596.553757425953
(2019-Apr-23.05375743)
0.00011091 TDB
period 1934.668089751075
5.30
2.3991e-05
6.568e-08
d
yr
n .186078429631989 2.3075e-09 deg/d
Q 3.406319117461667 2.816e-08 au
  Orbit Determination Parameters
   # obs. used (total)      781  
   data-arc span      8213 days (22.49 yr)  
   first obs. used      1997-04-02  
   last obs. used      2019-09-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5447  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:35:16  

Additional Information
 Earth MOID = 1.67196 au 
 Jupiter MOID = 1.76912 au 
 T_jup = 3.208 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO439363  

39771 (1997 GH21)          Discovered 1997-Apr-06 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 GH21 = 1999 VV201 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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