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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2353275650106765 3.9187e-08  
a 2.293633536778652 7.8986e-09 au
q 1.753878341541705 9.1793e-08 au
i 8.163181928949959 4.801e-06 deg
node 17.27168021715953 3.5442e-05 deg
peri 339.8177887729345 3.6756e-05 deg
M 129.1716914508916 1.205e-05 deg
tp 2457145.250667409869
(2015-May-02.75066741)
4.131e-05 JED
period 1268.774589010895
3.47
6.5539e-06
1.794e-08
d
yr
n .2837383433732283 1.4657e-09 deg/d
Q 2.833388732015598 9.7574e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1306  
   data-arc span      30935 days (84.70 yr)  
   first obs. used      1931-08-07  
   last obs. used      2016-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51863  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:36:54  

Additional Information
 Earth MOID = .751947 au 
 Jupiter MOID = 2.60975 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. 2016-February); 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. 586, A108.]

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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