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3023 Heard (1981 JS)
Classification: Main-belt Asteroid          SPK-ID: 2003023
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08434945258054884 2.1361e-08  
a 2.215788333146667 5.7179e-09 au
q 2.028887800211379 4.8742e-08 au
i 3.994266187594481 7.2832e-07 deg
node 230.6463992247186 1.4367e-05 deg
peri 344.7289207726818 1.4455e-05 deg
M 16.16178936412659 9.359e-06 deg
tp 2459146.414882763378
(2020-Oct-23.91488276)
3.1226e-05 TDB
period 1204.733075435439
3.30
4.6632e-06
1.277e-08
d
yr
n .2988213798893846 1.1567e-09 deg/d
Q 2.402688866081955 6.2002e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2886  
   data-arc span      15104 days (41.35 yr)  
   first obs. used      1979-11-14  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43313  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:41:12  

Additional Information
 Earth MOID = 1.02083 au 
 Jupiter MOID = 2.56574 au 
 T_jup = 3.646 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457086.5 (2015-Mar-05.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08462344409833841 2.1338e-08  
q 2.028684024780263 4.8719e-08 au
tp 2456736.753361356871
(2014-Mar-20.25336136)
2.8294e-05 TDB
node 230.6778595974028 1.4379e-05 deg
peri 344.8058140699006 1.4446e-05 deg
i 3.992309416989487 7.2833e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2886  
   data-arc span      15104 days (41.35 yr)  
   first obs. used      1979-11-14  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43313  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:41:12  

Additional Information
 Jupiter MOID = 2.56574 au 
 T_jup = 3.646 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.553273929634514E-16 -1.033838180079499E-15 -4.215469435797183E-14 -9.546653038117018E-14 7.693961772041788E-14 8.373689162464883E-15
q -1.033838180079499E-15 2.373575624472348E-15 1.173825970193301E-13 2.159609514556993E-13 -1.65601987962755E-13 -1.893926799923652E-14
tp -4.215469435797183E-14 1.173825970193301E-13 8.005688820584246E-10 1.040363903225665E-10 1.106449910217222E-10 -4.669803797484793E-12
node -9.546653038117018E-14 2.159609514556993E-13 1.040363903225665E-10 2.067438599611738E-10 -1.784189242326751E-10 -8.916832930043477E-12
peri 7.693961772041788E-14 -1.65601987962755E-13 1.106449910217222E-10 -1.784189242326751E-10 2.086737012620017E-10 7.679549001662132E-12
i 8.373689162464883E-15 -1.893926799923652E-14 -4.669803797484793E-12 -8.916832930043477E-12 7.679549001662132E-12 5.304583045973723E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.59   n/a E2021B10  
diameter diameter 4.991 km 0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.713 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.257   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3023 Heard (1981 JS)          Discovered 1981-May-05 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 JS = 1951 ET = 1964 DF = 1979 VO3 = 1979 YB2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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