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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06606621809183416 3.855e-08  
a 3.000546577520183 1.3312e-08 au
q 2.802311812935028 1.1493e-07 au
i 13.32499469566744 4.4038e-06 deg
node 182.933472277756 1.7163e-05 deg
peri 47.09822523085209 3.5321e-05 deg
M 181.3078925511064 3.0818e-05 deg
tp 2459542.827479707244
(2021-Nov-24.32747971)
0.00016343 TDB
period 1898.449223850756
5.20
1.2634e-05
3.459e-08
d
yr
n .1896284585740919 1.262e-09 deg/d
Q 3.198781342105338 1.4192e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2514  
   data-arc span      48779 days (133.55 yr)  
   first obs. used      1886-04-03  
   last obs. used      2019-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41855  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:51:22  

Additional Information
 Earth MOID = 1.81281 au 
 Jupiter MOID = 1.79761 au 
 T_jup = 3.209 
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Orbital Elements at Epoch 2455871.5 (2011-Nov-06.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06928635018827263 3.8225e-08  
q 2.791693461837106 1.144e-07 au
tp 2455752.323060963894
(2011-Jul-09.82306096)
0.00015439 TDB
node 183.0379826047367 1.72e-05 deg
peri 47.98568413289051 3.4254e-05 deg
i 13.31024610200624 4.4005e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2514  
   data-arc span      48779 days (133.55 yr)  
   first obs. used      1886-04-03  
   last obs. used      2019-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41855  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:51:22  

Additional Information
 Jupiter MOID = 1.79761 au 
 T_jup = 3.209 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.461134106924884E-15 -4.34744792675783E-15 -5.978128337559988E-13 -5.684879856552106E-16 -1.223639311000983E-13 -1.140812040380859E-15
q -4.34744792675783E-15 1.308773037684048E-14 1.779886981828658E-12 1.266820199202426E-15 3.64815084588419E-13 4.10891573733916E-15
tp -5.978128337559988E-13 1.779886981828658E-12 2.383649930693848E-8 -1.42648484475018E-11 4.592032520720177E-9 -1.853379148557382E-12
node -5.684879856552106E-16 1.266820199202426E-15 -1.42648484475018E-11 2.958413857734499E-10 -2.903856734294541E-10 7.555145061942253E-12
peri -1.223639311000983E-13 3.64815084588419E-13 4.592032520720177E-9 -2.903856734294541E-10 1.173312267476649E-9 -7.715198794721476E-12
i -1.140812040380859E-15 4.10891573733916E-15 -1.853379148557382E-12 7.555145061942253E-12 -7.715198794721476E-12 1.93642777937527E-11

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

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