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22485 Unterman (1997 GS22)
Classification: Main-belt Asteroid          SPK-ID: 2022485
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02432071792078594 4.504e-08  
a 2.778903028699117 1.5714e-08 au
q 2.711318112008908 1.1973e-07 au
i 3.738216706554178 4.9184e-06 deg
node 47.9195679988892 6.3335e-05 deg
peri 100.0617620674832 0.00012337 deg
M 106.1167447777942 0.00010502 deg
tp 2458701.741932641829
(2019-Aug-06.24193264)
0.00049283 TDB
period 1692.031777123591
4.63
1.4352e-05
3.929e-08
d
yr
n .2127619616057037 1.8047e-09 deg/d
Q 2.846487945389325 1.6097e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1050  
   data-arc span      9391 days (25.71 yr)  
   first obs. used      1994-10-08  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52941  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:06:53  

Additional Information
 Earth MOID = 1.72427 au 
 Jupiter MOID = 2.12498 au 
 T_jup = 3.330 
[ 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 14.75   n/a E2021B10  
diameter diameter 3.940 km 0.318 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.180   0.086 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22485 Unterman           Discovered 1997 Apr. 6 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Nathan Unterman mentored a finalist in the 2012 Intel Science Talent Search, a science competition for high-school seniors. He teaches at the Glenbrook North High School, Northbrook, Illinois.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

[ show close-approach data ]
Alternate Designations
 1997 GS22 = 1999 VJ28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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