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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1715456888600045 4.2673e-08  
a 2.542455572612066 1.1203e-08 au
q 2.106308280012372 1.1311e-07 au
i 3.443102873026625 3.978e-06 deg
node 329.9687480847961 6.3563e-05 deg
peri 3.57448301321803 6.4666e-05 deg
M 1.130720093607165 1.2966e-05 deg
tp 2459391.849163254547
(2021-Jun-26.34916325)
5.3331e-05 TDB
period 1480.738900661033
4.05
9.7873e-06
2.68e-08
d
yr
n .2431218629018853 1.607e-09 deg/d
Q 2.97860286521176 1.3125e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1179  
   data-arc span      11128 days (30.47 yr)  
   first obs. used      1991-02-19  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50993  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 01:54:25  

Additional Information
 Earth MOID = 1.09535 au 
 Jupiter MOID = 2.38267 au 
 T_jup = 3.421 
[ 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 15.59   n/a MPCxxxxx  
rotation period rot_per 77.122 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:
[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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