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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1685357128687487 3.3821e-08  
a 2.225150255204114 6.3416e-09 au
q 1.85013297070321 7.393e-08 au
i 5.413201069530699 3.4869e-06 deg
node 82.35234546088942 4.1995e-05 deg
peri 231.9739958612401 4.39e-05 deg
M 215.6729456894178 1.5536e-05 deg
tp 2459086.551947479900
(2020-Aug-25.05194748)
5.3363e-05 TDB
period 1212.376306913473
3.32
5.1828e-06
1.419e-08
d
yr
n .296937508550052 1.2694e-09 deg/d
Q 2.600167539705017 7.4103e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2970  
   data-arc span      34553 days (94.60 yr)  
   first obs. used      1924-10-02  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4055  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:16:52  

Additional Information
 Earth MOID = .841111 au 
 Jupiter MOID = 2.66572 au 
 T_jup = 3.622 
[ 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-January); 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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