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8995 Rachelstevenson (1981 EB9)
Classification: Main-belt Asteroid          SPK-ID: 2008995
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1694515247357505 2.9951e-08  
a 2.606216432917688 1.0321e-08 au
q 2.164589084568417 7.9091e-08 au
i 12.66667678090589 4.4845e-06 deg
node 342.1392446581087 1.6174e-05 deg
peri 308.7689778159561 2.2013e-05 deg
M 16.67922311382479 1.546e-05 deg
tp 2458929.298775516958
(2020-Mar-20.79877552)
6.5948e-05 TDB
period 1536.788652503203
4.21
9.1289e-06
2.499e-08
d
yr
n .2342547229338353 1.3915e-09 deg/d
Q 3.047843781266959 1.207e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2144  
   data-arc span      23913 days (65.47 yr)  
   first obs. used      1955-02-13  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44351  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:03:48  

Additional Information
 Earth MOID = 1.1735 au 
 Jupiter MOID = 2.28036 au 
 T_jup = 3.358 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9   n/a MPO473888  

8995 Rachelstevenson           Discovered 1981 Mar. 1 by S. J. Bus at Siding Spring.
Rachel Stevenson (b. 1984) is a postdoctoral fellow at the Jet Propulsion Laboratory. She studies transient activity in comets through photometric analysis of inner coma images and through data provided by the Wide-Field Infrared Survey Explorer spacecraft.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-07-12Last Updated: 2014-08-13

[ show close-approach data ]
Alternate Designations
 1981 EB9 = 1978 TG1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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