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187750 (1994 WB7)
Classification: Main-belt Asteroid          SPK-ID: 2187750
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09765175961272528 4.2798e-08  
a 2.435425814151679 1.0537e-08 au
q 2.197602197993513 1.034e-07 au
i 6.862078276194591 6.4681e-06 deg
node 157.8881196413892 2.5748e-05 deg
peri 130.1133155466787 4.1436e-05 deg
M 72.31943176653139 3.0649e-05 deg
tp 2458921.622620611105
(2020-Mar-13.12262061)
0.00011849 TDB
period 1388.227951017504
3.80
9.0093e-06
2.467e-08
d
yr
n .25932340559498 1.683e-09 deg/d
Q 2.673249430309844 1.1566e-08 au
  Orbit Determination Parameters
   # obs. used (total)      332  
   data-arc span      9483 days (25.96 yr)  
   first obs. used      1994-11-28  
   last obs. used      2020-11-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52378  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:56:41  

Additional Information
 Earth MOID = 1.18689 au 
 Jupiter MOID = 2.47281 au 
 T_jup = 3.489 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457723.5 (2016-Dec-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09726958869303863 4.298e-08  
q 2.199258190212203 1.0395e-07 au
tp 2457534.860883218877
(2016-May-26.36088322)
0.00012047 TDB
node 157.9379201625868 2.5765e-05 deg
peri 130.6399788296609 4.1434e-05 deg
i 6.859088971663457 6.4656e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      332  
   data-arc span      9483 days (25.96 yr)  
   first obs. used      1994-11-28  
   last obs. used      2020-11-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52378  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:56:41  

Additional Information
 Jupiter MOID = 2.47281 au 
 T_jup = 3.489 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.847246556990078E-15 -4.449155485903743E-15 2.967515375837164E-12 -1.173851026785728E-14 7.764127870221446E-13 -3.636361322094291E-15
q -4.449155485903743E-15 1.080587535160733E-14 -7.525896228185625E-12 2.786751883397071E-14 -1.968970330116129E-12 8.953413995307428E-15
tp 2.967515375837164E-12 -7.525896228185625E-12 1.451408262225131E-8 -2.870162279907515E-11 3.912712921233114E-9 -1.159577017249273E-11
node -1.173851026785728E-14 2.786751883397071E-14 -2.870162279907515E-11 6.638191470870903E-10 -6.661127255710221E-10 1.138563368219648E-11
peri 7.764127870221446E-13 -1.968970330116129E-12 3.912712921233114E-9 -6.661127255710221E-10 1.716747283588883E-9 -1.440018880315632E-11
i -3.636361322094291E-15 8.953413995307428E-15 -1.159577017249273E-11 1.138563368219648E-11 -1.440018880315632E-11 4.180380245805117E-11

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 17.08   n/a MPCxxxxx  

187750 (1994 WB7)          Discovered 1994-Nov-28 by Spacewatch at Kitt Peak
Reference: 20080618/Numbers.arcLast Updated: 2008-06-20

[ show close-approach data ]
Alternate Designations
 1994 WB7 = 2001 SJ185 = 2005 SV142 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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