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18802 (1999 JR76)
Classification: Main-belt Asteroid          SPK-ID: 2018802
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1559819344636903 3.739e-08  
a 2.687706414192635 1.3878e-08 au
q 2.268472768436399 1.0215e-07 au
i 11.71400191605205 4.2473e-06 deg
node 212.2470210461923 2.2439e-05 deg
peri 74.99038555815729 2.6716e-05 deg
M 292.430942500721 1.5768e-05 deg
tp 2459502.576213532400
(2021-Oct-15.07621353)
7.1295e-05 TDB
period 1609.426576252369
4.41
1.2465e-05
3.413e-08
d
yr
n .2236821519614012 1.7324e-09 deg/d
Q 3.106940059948871 1.6042e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1458  
   data-arc span      10747 days (29.42 yr)  
   first obs. used      1991-10-04  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49966  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:38:23  

Additional Information
 Earth MOID = 1.28472 au 
 Jupiter MOID = 2.10792 au 
 T_jup = 3.326 
[ 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 14.11   n/a E2021B10  
diameter diameter 3.940 km 0.688 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 11.9674 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 0.313   0.111 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18802 (1999 JR76)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JR76 = 1991 TN4 = 1994 GM11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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