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30762 (1981 ES42)
Classification: Main-belt Asteroid          SPK-ID: 2030762
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1682051769247803 2.8485e-08  
a 2.66020826165852 9.7459e-09 au
q 2.212747460349486 7.5565e-08 au
i 1.930940539711897 4.3754e-06 deg
node 16.41139263973159 9.7635e-05 deg
peri 80.21626913464885 9.8985e-05 deg
M 120.6804107899575 1.4472e-05 deg
tp 2458669.241168439590
(2019-Jul-04.74116844)
6.3075e-05 TDB
period 1584.790589540011
4.34
8.709e-06
2.384e-08
d
yr
n .2271593498699982 1.2483e-09 deg/d
Q 3.107669062967554 1.1385e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1356  
   data-arc span      15738 days (43.09 yr)  
   first obs. used      1977-04-24  
   last obs. used      2020-05-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50855  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:39:46  

Additional Information
 Earth MOID = 1.23033 au 
 Jupiter MOID = 2.06412 au 
 T_jup = 3.365 
[ 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 15.12   n/a E2021B10  
diameter diameter 4.972 km 1.520 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 16.4 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:
[Binzel, R.P.; Xu, S.; Bus, S.J.; Bowell, E. (1992) Icarus 99, 225-237; Science 257, 779-782.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.065   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

30762 (1981 ES42)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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