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27989 (1997 VG4)
Classification: Main-belt Asteroid          SPK-ID: 2027989
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1775486663878842 3.8928e-08  
a 3.185588736417492 2.1356e-08 au
q 2.619991704606301 1.2928e-07 au
i 2.034023575886486 3.9891e-06 deg
node 136.1426863873633 0.00013377 deg
peri 9.346423676299482 0.00013444 deg
M 284.609094659113 1.5918e-05 deg
tp 2459435.410051836404
(2021-Aug-08.91005184)
9.4397e-05 TDB
period 2076.744110621439
5.69
2.0883e-05
5.717e-08
d
yr
n .1733482705735348 1.7431e-09 deg/d
Q 3.751185768228682 2.5147e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1492  
   data-arc span      10310 days (28.23 yr)  
   first obs. used      1991-11-04  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5441  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 01:14:09  

Additional Information
 Earth MOID = 1.63215 au 
 Jupiter MOID = 1.26311 au 
 T_jup = 3.172 
[ 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 13.5   n/a MPO337494  
diameter diameter 11.154 km 0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.059   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27989 (1997 VG4)          Discovered 1997-Nov-07 by Kobayashi, T. at Oizumi
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 VG4 = 1991 VD8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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