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7204 Ondrejov (1995 GH)
Classification: Main-belt Asteroid          SPK-ID: 2007204
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1229479580389617 3.0655e-08  
a 2.66776282238124 9.2644e-09 au
q 2.339766830837209 8.0791e-08 au
i 4.859218549704638 3.9315e-06 deg
node 172.263240693589 3.4062e-05 deg
peri 236.2781757506492 3.769e-05 deg
M 123.3955004344645 1.486e-05 deg
tp 2458850.973221683341
(2020-Jan-02.47322168)
6.5695e-05 TDB
period 1591.546203082988
4.36
8.2905e-06
2.27e-08
d
yr
n .2261951298068778 1.1783e-09 deg/d
Q 2.995758813925272 1.0403e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2257  
   data-arc span      14823 days (40.58 yr)  
   first obs. used      1980-11-29  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46179  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 00:58:29  

Additional Information
 Earth MOID = 1.35313 au 
 Jupiter MOID = 2.37609 au 
 T_jup = 3.367 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457387.5 (2015-Dec-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1210988499114941 3.0789e-08  
q 2.344636122758471 8.1008e-08 au
tp 2457253.767382468458
(2015-Aug-19.26738247)
6.7828e-05 TDB
node 172.3400548333514 3.4001e-05 deg
peri 235.1880755481354 3.7775e-05 deg
i 4.861213667650158 3.9361e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2257  
   data-arc span      14823 days (40.58 yr)  
   first obs. used      1980-11-29  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46179  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 00:58:29  

Additional Information
 Jupiter MOID = 2.37609 au 
 T_jup = 3.367 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.479932770634925E-16 -2.48210843468573E-15 -8.005792569087956E-13 7.618165633448389E-15 -2.120628564439897E-13 -1.128069648441071E-15
q -2.48210843468573E-15 6.562359687278411E-15 2.0679284070681E-12 -2.04308968359137E-14 5.500235075207951E-13 3.050460487812858E-15
tp -8.005792569087956E-13 2.0679284070681E-12 4.600669667372178E-9 -1.11025927669129E-11 1.122268114450545E-9 1.650488959967519E-12
node 7.618165633448389E-15 -2.04308968359137E-14 -1.11025927669129E-11 1.156076062333588E-9 -1.154415579552603E-9 4.743587008720411E-12
peri -2.120628564439897E-13 5.500235075207951E-13 1.122268114450545E-9 -1.154415579552603E-9 1.426927409200399E-9 -4.327697632709622E-12
i -1.128069648441071E-15 3.050460487812858E-15 1.650488959967519E-12 4.743587008720411E-12 -4.327697632709622E-12 1.549297754167492E-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 13.82   n/a MPO636174  
diameter diameter 5.685 km 0.163 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.233 h n/a LCDB (Rev. 2020-October); 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.]
geometric albedo albedo 0.181   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7204 Ondrejov (1995 GH)          Discovered 1995-Apr-03 by Pravec, P. at Ondrejov
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1995 GH = 1980 WM3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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