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JPL Small-Body Database Browser
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256 Walpurga
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0658533683049899 3.7661e-08  
a 3.000710451846166 1.3107e-08 au
q 2.803103561284108 1.1276e-07 au
i 13.32442583209578 4.2563e-06 deg
node 182.915920832934 1.7171e-05 deg
peri 47.26378153038257 3.4839e-05 deg
M 256.9760871991343 3.0602e-05 deg
tp 2459543.838028691953
(2021-Nov-25.33802869)
0.00016207 TDB
period 1898.604751182191
5.20
1.2439e-05
3.406e-08
d
yr
n .1896129248469653 1.2423e-09 deg/d
Q 3.198317342408225 1.397e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2609  
   data-arc span      48853 days (133.75 yr)  
   first obs. used      1886-04-03  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40828  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:20:57  

Additional Information
 Earth MOID = 1.81353 au 
 Jupiter MOID = 1.7972 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 9.9   n/a MPO319083  
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. 2019-January); 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          Discovered 1886-Apr-03 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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