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19102 (1981 EH8)
Classification: Main-belt Asteroid          SPK-ID: 2019102
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1373995363380378 5.0322e-08  
a 2.278841120631298 8.3789e-09 au
q 1.965729407268503 1.1216e-07 au
i 7.288332137424287 4.1814e-06 deg
node 322.7073591768191 3.1287e-05 deg
peri 209.5746237159877 3.3143e-05 deg
M 200.6533969218909 1.2357e-05 deg
tp 2459756.672878707317
(2022-Jun-26.17287871)
4.4378e-05 TDB
period 1256.520267560949
3.44
6.93e-06
1.897e-08
d
yr
n .2865055258510088 1.5801e-09 deg/d
Q 2.591952833994093 9.5301e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1094  
   data-arc span      14554 days (39.85 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-12-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52609  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:45:51  

Additional Information
 Earth MOID = .975247 au 
 Jupiter MOID = 2.39487 au 
 T_jup = 3.584 
[ 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 15.50   n/a E2021B10  
diameter diameter 2.506 km 0.799 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 55.581 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 0.135   0.064 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19102 (1981 EH8)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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