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JPL Small-Body Database Browser
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39556 (1992 GF2)
Classification: Main-belt Asteroid          SPK-ID: 2039556
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1174843332185267 3.8968e-08  
a 2.206472507879509 6.0246e-09 au
q 1.947246556526275 8.7271e-08 au
i 2.128700232760382 4.4879e-06 deg
node 36.36781179458538 8.3128e-05 deg
peri 300.6494242502994 8.4889e-05 deg
M 89.6680289056972 1.5992e-05 deg
tp 2458702.318063991108
(2019-Aug-06.81806399)
5.3493e-05 TDB
period 1197.143488858163
3.28
4.9031e-06
1.342e-08
d
yr
n .3007158317699814 1.2316e-09 deg/d
Q 2.465698459232744 6.7324e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1723  
   data-arc span      11675 days (31.96 yr)  
   first obs. used      1988-02-16  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50657  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:29:43  

Additional Information
 Earth MOID = .938866 au 
 Jupiter MOID = 2.85435 au 
 T_jup = 3.651 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456939.5 (2014-Oct-09.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1178980677448762 3.9068e-08  
q 1.946282474471751 8.757e-08 au
tp 2457505.836451809051
(2016-Apr-27.33645181)
5.4749e-05 TDB
node 36.38978447122619 8.3054e-05 deg
peri 300.7649977221939 8.4802e-05 deg
i 2.130262680860258 4.4896e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1723  
   data-arc span      11675 days (31.96 yr)  
   first obs. used      1988-02-16  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50657  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:29:43  

Additional Information
 Jupiter MOID = 2.85435 au 
 T_jup = 3.651 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.526301476345207E-15 -3.415070609702644E-15 1.173073513927874E-12 -4.901382777236781E-16 3.603882235383357E-13 -1.346018482608266E-15
q -3.415070609702644E-15 7.668510089110594E-15 -2.69584198044189E-12 1.079167420247227E-15 -8.321103769023389E-13 3.018879997027486E-15
tp 1.173073513927874E-12 -2.69584198044189E-12 2.997426684783592E-9 1.32282337040148E-12 9.438903946128496E-10 -1.753555604908779E-12
node -4.901382777236781E-16 1.079167420247227E-15 1.32282337040148E-12 6.898021628051257E-9 -6.89237293438752E-9 -1.364844606018658E-10
peri 3.603882235383357E-13 -8.321103769023389E-13 9.438903946128496E-10 -6.89237293438752E-9 7.191319547237681E-9 1.358614378558613E-10
i -1.346018482608266E-15 3.018879997027486E-15 -1.753555604908779E-12 -1.364844606018658E-10 1.358614378558613E-10 2.015648169423581E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7   n/a MPO337578  
rotation period rot_per 2.561 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

39556 (1992 GF2)          Discovered 1992-Apr-04 by Elst, E. W. at La Silla
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1992 GF2 = 1988 DS3 = 1995 EH9 = 1998 BL41 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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