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967 Helionape (A921 VE)
Classification: Main-belt Asteroid          SPK-ID: 2000967
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1687132584313601 3.205e-08  
a 2.225890718338101 5.6023e-09 au
q 1.850353442335159 7.0634e-08 au
i 5.412733839959285 3.4366e-06 deg
node 82.35251814347049 3.9852e-05 deg
peri 231.8545705937426 4.1448e-05 deg
M 334.5577266881686 1.332e-05 deg
tp 2459086.225020488391
(2020-Aug-24.72502049)
4.5004e-05 TDB
period 1212.981520856062
3.32
4.5794e-06
1.254e-08
d
yr
n .2967893523603969 1.1205e-09 deg/d
Q 2.601427994341043 6.5475e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3164  
   data-arc span      34957 days (95.71 yr)  
   first obs. used      1924-10-02  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39839  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:23:56  

Additional Information
 Earth MOID = .842105 au 
 Jupiter MOID = 2.666 au 
 T_jup = 3.621 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8   n/a MPO263352  
diameter diameter 10.216 km 0.362 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 3.234 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Apostolovska, G.; Ivanova, V. Kostov, A. (2009) Minor Planet Bull. 36, 27-28.]
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
[Klinglesmith III, D.A.; Hendrickx, S.; Madden, K.; Montgomery, S. (2016) Minor Planet Bull. 43, 234-239.]
geometric albedo albedo 0.294   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

967 Helionape (A921 VE)          Discovered 1921-Nov-09 by Baade, W. at Bergedorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A921 VE = A922 AB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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