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305207 (2007 WS20)
Classification: Main-belt Asteroid          SPK-ID: 2305207
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01185790201280491 6.9857e-08  
a 3.00326874530605 4.558e-08 au
q 2.967656278806092 1.9877e-07 au
i 10.61208951425817 6.5354e-06 deg
node 112.1638636293257 4.4039e-05 deg
peri 31.95059658121053 0.00032593 deg
M 122.575846363016 0.00032249 deg
tp 2458353.220099439784
(2018-Aug-22.72009944)
0.0017013 TDB
period 1901.033287680284
5.20
4.3278e-05
1.185e-07
d
yr
n .1893706976795163 4.3111e-09 deg/d
Q 3.038881211806009 4.6121e-08 au
  Orbit Determination Parameters
   # obs. used (total)      177  
   data-arc span      4217 days (11.55 yr)  
   first obs. used      2007-11-09  
   last obs. used      2019-05-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53815  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 05:54:25  

Additional Information
 Earth MOID = 1.98598 au 
 Jupiter MOID = 2.00641 au 
 T_jup = 3.226 
[ 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 15.9   n/a MPO433966  

305207 (2007 WS20)          Discovered 2007-Nov-18 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1992-Feb-08 20:16 < 00:01 Inter 0.0489644152068535 0.0489624628152691 0.0489663689822494 8.73197331160689 8.73197327736752 2448661.344755765 0.983653695949364 525.497902805 59.1030321543488 -81.4773863438705 122559.57042382 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 05:54:26 2019-Sep-24 05:54
2150-Jul-30 05:42 00:05 Inter 0.0211181478915217 0.0210685250074504 0.0211679280588024 8.70035114304542 8.70035106336968 2506541.737423613 4.76781055226037 3794.99172423477 62.4542037941551 -49.2438747522375 38312.0191715104 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 05:54:26 2019-Sep-24 05:54
2160-Oct-25 00:20 00:20 Cybel 0.0342330767436224 0.0341581152117495 0.0343080611118144 2.73582277100691 2.73582270605647 2510281.514094802 19.6479413675548 3986.38327418738 63.6363773394503 20.4620665652197 28128.3967158926 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 05:54:26 2019-Sep-24 05:54
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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