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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 | Close-Approach Data ]

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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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08443117848538108 3.0393e-08  
a 2.216017059320225 5.8922e-09 au
q 2.02891612745811 6.9154e-08 au
i 3.994137276006438 3.0264e-06 deg
node 230.6490071897408 4.3345e-05 deg
peri 344.667240323688 4.6998e-05 deg
M 316.4550449703817 1.811e-05 deg
tp 2459146.244918431382
(2020-Oct-23.74491843)
6.0732e-05 TDB
period 1204.919619267256
3.30
4.8057e-06
1.316e-08
d
yr
n .2987751168156143 1.1916e-09 deg/d
Q 2.40311799118234 6.3897e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2816  
   data-arc span      14841 days (40.63 yr)  
   first obs. used      1979-11-14  
   last obs. used      2020-07-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42942  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:03:53  

Additional Information
 Earth MOID = 1.02196 au 
 Jupiter MOID = 2.56642 au 
 T_jup = 3.645 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5   n/a MPO358657  
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. 2019-August); 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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1968-Oct-01 00:33 < 00:01 Hebe 0.0238673153255743 0.0238633788837258 0.0238712517881389 7.94345789191736 7.94345785912713 2440130.522743675 0.205887678088196 199.434692003343 27.5588294898714 10.3290197884608 29144.8731564 T 36 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:00 2020-Nov-13 04:04
2015-Sep-08 20:17 < 00:01 Amphi 0.0195536115419137 0.0195528394134447 0.0195543836935581 3.49043145834188 3.49043137411186 2457274.345471134 0.463026790352599 55.7420407434064 21.3625907441797 -51.569745512288 112036.491405493 T 36 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:00 2020-Nov-13 04:04

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