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21037 (1990 EB)
Classification: Main-belt Asteroid          SPK-ID: 2021037
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1521777705027865 1.821e-08  
a 2.374225813245985 6.7241e-09 au
q 2.012921422316046 4.1585e-08 au
i 12.09418146073793 3.8305e-07 deg
node 149.9340450442083 6.7146e-06 deg
peri 54.44016553880496 7.2418e-06 deg
M 119.7897564213693 6.8998e-06 deg
tp 2458755.870123261285
(2019-Sep-29.37012326)
2.4801e-05 TDB
period 1336.230746332689
3.66
5.6766e-06
1.554e-08
d
yr
n .2694145460939489 1.1445e-09 deg/d
Q 2.735530204175924 7.7474e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2501  
   data-arc span      11238 days (30.77 yr)  
   first obs. used      1990-03-04  
   last obs. used      2020-12-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44253  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:37:00  

Additional Information
 Earth MOID = 1.03662 au 
 Jupiter MOID = 2.27129 au 
 T_jup = 3.497 
[ 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 14.03   n/a E2021B10  
diameter diameter 5.855 km 0.622 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 17.9234 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.156   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21037 (1990 EB)          Discovered 1990-Mar-04 by Sugie, A. at Dynic
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 EB = 1999 RM39 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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