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18791 (1999 JF58)
Classification: Main-belt Asteroid          SPK-ID: 2018791
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1501733442436998 1.4089e-08  
a 2.378979668780253 8.4351e-09 au
q 2.021720336031753 3.2594e-08 au
i 5.685694016294654 7.5686e-07 deg
node 37.42632425647721 1.238e-05 deg
peri 328.42697375 1.4995e-05 deg
M 208.0882665341045 8.9618e-06 deg
tp 2459766.053040207774
(2022-Jul-05.55304021)
3.4431e-05 TDB
period 1340.246008847677
3.67
7.1281e-06
1.952e-08
d
yr
n .2686074031360275 1.4286e-09 deg/d
Q 2.736239001528753 9.7018e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2967  
   data-arc span      11519 days (31.54 yr)  
   first obs. used      1989-09-07  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3841  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:47:43  

Additional Information
 Earth MOID = 1.02156 au 
 Jupiter MOID = 2.72707 au 
 T_jup = 3.518 
[ 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 14.21   n/a MPCxxxxx  
diameter diameter 4.000 km 0.215 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 57.5975 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:
[McNeill, A.; Mommert, M.; Trilling, D.E.; Llama, J.; Skiff, B. (2019) Ap. J. Suppl. Series 245, id.29.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.277   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18791 (1999 JF58)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JF58 = 1989 RR2 = 1989 WO4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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