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1312 Vassar (1933 OT)
Classification: Main-belt Asteroid          SPK-ID: 2001312
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 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2118936065185567 3.323e-08  
a 3.101355596304485 1.3211e-08 au
q 2.444198173907019 1.0231e-07 au
i 21.93125237428004 3.9201e-06 deg
node 129.2337432607197 1.0474e-05 deg
peri 261.3275212144634 1.3953e-05 deg
M 285.8814753680101 1.1463e-05 deg
tp 2459411.223960229617
(2021-Jul-15.72396023)
6.4759e-05 TDB
period 1994.921329273798
5.46
1.2747e-05
3.49e-08
d
yr
n .1804582440005537 1.1531e-09 deg/d
Q 3.758513018701951 1.601e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2592  
   data-arc span      31737 days (86.89 yr)  
   first obs. used      1933-07-27  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38715  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:29:31  

Additional Information
 Earth MOID = 1.55801 au 
 Jupiter MOID = 2.12355 au 
 T_jup = 3.078 
[ 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 10.7   n/a MPO448925  
diameter diameter 36.28 km 1.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 7.932 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.0643   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6

1312 Vassar (1933 OT)          Discovered 1933-Jul-27 by Van Biesbroeck, G. at Williams Bay
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1933 OT = 1944 QE = 2019 FN5 = A908 CD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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