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2473 Heyerdahl (1977 RX7)
Classification: Main-belt Asteroid          SPK-ID: 2002473
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1350797479081781 3.1733e-08  
a 2.242358225597898 7.0459e-09 au
q 1.939461041764304 7.1966e-08 au
i 5.188898961969142 4.1129e-06 deg
node 185.663205010604 3.5863e-05 deg
peri 230.8397265239208 3.901e-05 deg
M 214.9113090476741 1.6783e-05 deg
tp 2459494.795867423061
(2021-Oct-07.29586742)
5.8133e-05 TDB
period 1226.467142988924
3.36
5.7806e-06
1.583e-08
d
yr
n .2935260043923175 1.3835e-09 deg/d
Q 2.545255409431491 7.9976e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2503  
   data-arc span      30198 days (82.68 yr)  
   first obs. used      1937-11-29  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45678  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:51:32  

Additional Information
 Earth MOID = .955613 au 
 Jupiter MOID = 2.78025 au 
 T_jup = 3.616 
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Orbital Elements at Epoch 2456715.5 (2014-Feb-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .134879167714249 3.1673e-08  
q 1.939589817739147 7.176e-08 au
tp 2457043.137858485525
(2015-Jan-20.63785849)
5.4465e-05 TDB
node 185.7076611025681 3.5884e-05 deg
peri 230.9257852272959 3.904e-05 deg
i 5.186820908833221 4.1124e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2503  
   data-arc span      30198 days (82.68 yr)  
   first obs. used      1937-11-29  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45678  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:51:32  

Additional Information
 Jupiter MOID = 2.78025 au 
 T_jup = 3.616 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.003179851591727E-15 -2.2645483914078E-15 -3.261616331994651E-13 2.107676507874812E-15 -1.060164098840451E-13 3.209049755257133E-16
q -2.2645483914078E-15 5.149456816029835E-15 8.061922105154521E-13 -5.174250238064497E-15 2.560421530052819E-13 -6.253931364164093E-16
tp -3.261616331994651E-13 8.061922105154521E-13 2.966441528214406E-9 -8.871889755983491E-12 8.446453537853078E-10 9.958100454580924E-14
node 2.107676507874812E-15 -5.174250238064497E-15 -8.871889755983491E-12 1.287696885571757E-9 -1.284431694597671E-9 -1.450861168322958E-12
peri -1.060164098840451E-13 2.560421530052819E-13 8.446453537853078E-10 -1.284431694597671E-9 1.524151529150811E-9 1.473453871629124E-12
i 3.209049755257133E-16 -6.253931364164093E-16 9.958100454580924E-14 -1.450861168322958E-12 1.473453871629124E-12 1.691152619010431E-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 13.2   n/a MPO473798  
diameter diameter 4.935 km 0.219 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.381   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2473 Heyerdahl (1977 RX7)          Discovered 1977-Sep-12 by Chernykh, N. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1977 RX7 = 1937 WG = 1957 WF = 1967 RW = 1967 UD = 1976 JL2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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