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256 Walpurga (A886 GA)
Classification: Main-belt Asteroid          SPK-ID: 2000256
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06573069426393359 2.2769e-08  
a 3.000392254777043 1.1091e-08 au
q 2.803174388806419 7.1599e-08 au
i 13.32582417365989 6.9962e-07 deg
node 182.9094385389029 1.5642e-06 deg
peri 47.35502698083737 8.9224e-06 deg
M 294.8027222258436 6.9298e-06 deg
tp 2459544.289368610897
(2021-Nov-25.78936861)
3.6326e-05 TDB
period 1898.302765471936
5.20
1.0525e-05
2.882e-08
d
yr
n .189643088841258 1.0515e-09 deg/d
Q 3.197610120747667 1.182e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3085  
   data-arc span      49290 days (134.95 yr)  
   first obs. used      1886-04-03  
   last obs. used      2021-03-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39641  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:35:14  

Additional Information
 Earth MOID = 1.81259 au 
 Jupiter MOID = 1.7969 au 
 T_jup = 3.209 
[ 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 9.96   n/a E2021B10  
diameter diameter 66.634 km 0.422 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 16.664 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Shipley, H.; Dillard, A.; Kendall, J.; Reichert, M.; et al. (2008) Minor Planet Bull. 35, 99-101.]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.050   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

256 Walpurga (A886 GA)          Discovered 1886-Apr-03 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A886 GA = 1951 VJ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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