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85944 (1999 EM7)
Classification: Main-belt Asteroid          SPK-ID: 2085944
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1713913310161006 4.8709e-08  
a 2.541141611048139 1.2455e-08 au
q 2.105611968030201 1.2838e-07 au
i 3.442985969754344 4.5412e-06 deg
node 329.9752338641362 6.994e-05 deg
peri 3.799864058762917 7.1125e-05 deg
M 264.6157149156687 1.4864e-05 deg
tp 2459392.527070080597
(2021-Jun-27.02707008)
6.1552e-05 TDB
period 1479.591162257378
4.05
1.0878e-05
2.978e-08
d
yr
n .2433104557415418 1.7888e-09 deg/d
Q 2.976671254066078 1.459e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1071  
   data-arc span      10661 days (29.19 yr)  
   first obs. used      1991-02-19  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51527  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:41:17  

Additional Information
 Earth MOID = 1.09548 au 
 Jupiter MOID = 2.38583 au 
 T_jup = 3.422 
[ 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 15.6   n/a MPO468829  
rotation period rot_per 77.122 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

85944 (1999 EM7)          Discovered 1999-Mar-12 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1999 EM7 = 2001 TO114 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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