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27994 (1997 WM1)
Classification: Main-belt Asteroid          SPK-ID: 2027994
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07435132238011757 3.4911e-08  
a 3.061352643389428 1.844e-08 au
q 2.833737026081555 1.1204e-07 au
i 8.454127296076797 4.0825e-06 deg
node 273.0842897418 3.267e-05 deg
peri 166.0594441259828 4.8027e-05 deg
M 345.6873849282181 3.459e-05 deg
tp 2458678.283047948332
(2019-Jul-13.78304795)
0.00018804 TDB
period 1956.448707728245
5.36
1.7677e-05
4.84e-08
d
yr
n .1840068684540258 1.6626e-09 deg/d
Q 3.2889682606973 1.9811e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1621  
   data-arc span      8050 days (22.04 yr)  
   first obs. used      1997-11-19  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50241  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 01:43:26  

Additional Information
 Earth MOID = 1.85027 au 
 Jupiter MOID = 1.91847 au 
 T_jup = 3.213 
[ 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 13.2   n/a MPO337494  
diameter diameter 9.803 km 0.217 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.139   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27994 (1997 WM1)          Discovered 1997-Nov-19 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 WM1 = 1999 CQ116 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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