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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1687132549267419 3.1501e-08  
a 2.225890717176398 5.1619e-09 au
q 1.850353449170349 6.9717e-08 au
i 5.412733177855615 3.3857e-06 deg
node 82.35252995716137 3.8445e-05 deg
peri 231.8545562664232 3.9815e-05 deg
M 334.557730363562 1.1387e-05 deg
tp 2459086.225008037436
(2020-Aug-24.72500804)
3.8435e-05 TDB
period 1212.981519906471
3.32
4.2194e-06
1.155e-08
d
yr
n .2967893525927405 1.0324e-09 deg/d
Q 2.601427985182448 6.0328e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3250  
   data-arc span      35007 days (95.84 yr)  
   first obs. used      1924-10-02  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39383  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:25:48  

Additional Information
 Earth MOID = .842105 au 
 Jupiter MOID = 2.666 au 
 T_jup = 3.621 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456398.5 (2013-Apr-16.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .169033125840986 3.1566e-08  
q 1.849168956349706 6.9856e-08 au
tp 2456660.047252745188
(2014-Jan-02.54725275)
3.7223e-05 TDB
node 82.43002945984064 3.8416e-05 deg
peri 231.6176790015917 3.9776e-05 deg
i 5.415176793922222 3.3873e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3250  
   data-arc span      35007 days (95.84 yr)  
   first obs. used      1924-10-02  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39383  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:25:48  

Additional Information
 Jupiter MOID = 2.666 au 
 T_jup = 3.621 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.964010932269235E-16 -2.200959329230358E-15 8.714271145187701E-14 -2.726842976122328E-15 3.070958038652296E-14 5.472374510455144E-16
q -2.200959329230358E-15 4.879911292862468E-15 -1.918184561457036E-13 6.043107646435106E-15 -6.934447544265625E-14 -1.187052598538832E-15
tp 8.714271145187701E-14 -1.918184561457036E-13 1.385579488181411E-9 4.664147625945981E-13 3.965754533671131E-10 1.059231996084297E-13
node -2.726842976122328E-15 6.043107646435106E-15 4.664147625945981E-13 1.475789387198032E-9 -1.468638149416476E-9 -2.971308131326188E-12
peri 3.070958038652296E-14 -6.934447544265625E-14 3.965754533671131E-10 -1.468638149416476E-9 1.582107991410314E-9 2.990857870384453E-12
i 5.472374510455144E-16 -1.187052598538832E-15 1.059231996084297E-13 -2.971308131326188E-12 2.990857870384453E-12 1.147349704365911E-11

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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