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101850 (1999 JT91)
Classification: Main-belt Asteroid          SPK-ID: 2101850
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1435779611440766 2.866e-08  
a 2.669532081450182 1.3234e-08 au
q 2.286246107986862 7.5832e-08 au
i 12.81221384633542 3.3965e-06 deg
node 85.58281997713715 2.1102e-05 deg
peri 15.90478570366423 3.0193e-05 deg
M 93.25231355473031 1.9334e-05 deg
tp 2458787.824906816880
(2019-Oct-31.32490682)
8.5846e-05 TDB
period 1593.129734617584
4.36
1.1847e-05
3.244e-08
d
yr
n .2259702974449941 1.6803e-09 deg/d
Q 3.052818054913502 1.5134e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1350  
   data-arc span      7980 days (21.85 yr)  
   first obs. used      1999-05-10  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51693  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:00  

Additional Information
 Earth MOID = 1.30538 au 
 Jupiter MOID = 2.14222 au 
 T_jup = 3.332 
[ 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 14.55   n/a E2021B55  
diameter diameter 7.765 km 0.235 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.66002 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 0.061   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

101850 (1999 JT91)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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