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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1502943348633935 1.2649e-08  
a 2.378871578027402 7.8221e-09 au
q 2.021340656482343 3.0266e-08 au
i 5.685880732735668 7.5666e-07 deg
node 37.42627529019197 1.2229e-05 deg
peri 328.4182085215057 1.4386e-05 deg
M 260.7586400999156 8.8766e-06 deg
tp 2459765.941032369906
(2022-Jul-05.44103237)
3.3913e-05 TDB
period 1340.154667238221
3.67
6.61e-06
1.81e-08
d
yr
n .2686257107486592 1.3249e-09 deg/d
Q 2.736402499572462 8.9978e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3112  
   data-arc span      11615 days (31.80 yr)  
   first obs. used      1989-09-07  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38135  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:41:15  

Additional Information
 Earth MOID = 1.02191 au 
 Jupiter MOID = 2.72751 au 
 T_jup = 3.518 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457299.5 (2015-Oct-04.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1498671615767049 1.2875e-08  
q 2.022653343253529 3.0863e-08 au
tp 2457082.040545892836
(2015-Feb-28.54054589)
2.9657e-05 TDB
node 37.4677993065899 1.2242e-05 deg
peri 327.7885684376561 1.4391e-05 deg
i 5.684107361033679 7.5582e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3112  
   data-arc span      11615 days (31.80 yr)  
   first obs. used      1989-09-07  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38135  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:41:15  

Additional Information
 Jupiter MOID = 2.72751 au 
 T_jup = 3.518 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.657537926991828E-16 -3.879873325202621E-16 -2.063731876668974E-13 1.741080779813954E-14 -8.606496430719307E-14 1.560873991901734E-15
q -3.879873325202621E-16 9.525524692812718E-16 5.169689452872078E-13 -4.235284290444802E-14 2.14301916296977E-13 -3.756248244082103E-15
tp -2.063731876668974E-13 5.169689452872078E-13 8.795265865908415E-10 4.558119084856909E-11 2.154577865366573E-10 4.296882643126654E-12
node 1.741080779813954E-14 -4.235284290444802E-14 4.558119084856909E-11 1.498635075396413E-10 -1.39121025794178E-10 9.907755856315014E-13
peri -8.606496430719307E-14 2.14301916296977E-13 2.154577865366573E-10 -1.39121025794178E-10 2.070981449768287E-10 1.491973657057319E-13
i 1.560873991901734E-15 -3.756248244082103E-15 4.296882643126654E-12 9.907755856315014E-13 1.491973657057319E-13 5.712569601006433E-13

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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