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1946 Walraven (1931 PH)
Classification: Main-belt Asteroid          SPK-ID: 2001946
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2355016665098921 4.1521e-08  
a 2.293148159719649 8.5684e-09 au
q 1.753107946551579 9.7865e-08 au
i 8.163029243349422 5.0043e-06 deg
node 17.27513335254892 3.5494e-05 deg
peri 339.7682330630315 3.6808e-05 deg
M 72.45291657658161 1.2125e-05 deg
tp 2457145.229886408362
(2015-May-02.72988641)
4.1995e-05 JED
period 1268.371864586785
3.47
7.109e-06
1.946e-08
d
yr
n .2838284339563794 1.5908e-09 deg/d
Q 2.833188372887719 1.0586e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1235  
   data-arc span      30806 days (84.34 yr)  
   first obs. used      1931-08-07  
   last obs. used      2015-12-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52875  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:41:23  

Additional Information
 Earth MOID = .750364 au 
 Jupiter MOID = 2.60989 au 
 T_jup = 3.546 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.0 mag n/a MPO263363  
rotation period rot_per 10.223 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[van Gent, H. (1933) Bul. Astron. Inst. Netherlands 7, 65-66.]
[Folberth, J.; Casimir, S.; Dou, Y.; Evans, D; et al. (2012) Minor Planet Bul. 39, 51-55.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2015) Astron. Astrophys., in press.arXiv:1510.07422]

1946 Walraven (1931 PH)          Discovered 1931-Aug-08 by Van Gent, H. at Johannesburg (LS)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1931 PH = 1952 PB = 1959 RE1 = 1966 TC = 1972 JE1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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