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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1694515392671691 2.8129e-08  
a 2.606216426459581 9.2017e-09 au
q 2.164589041332624 7.2898e-08 au
i 12.66667601297092 4.4392e-06 deg
node 342.1392221018751 1.2731e-05 deg
peri 308.768993044119 1.8738e-05 deg
M 16.67923343992781 1.3061e-05 deg
tp 2458929.298731700948
(2020-Mar-20.79873170)
5.5821e-05 TDB
period 1536.788646791045
4.21
8.1389e-06
2.228e-08
d
yr
n .2342547238045471 1.2406e-09 deg/d
Q 3.047843811586538 1.0761e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2411  
   data-arc span      24002 days (65.71 yr)  
   first obs. used      1955-02-13  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42251  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:16:54  

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2166-Jul-12 11:47 00:03 Iris 0.0479673481563385 0.0479476020840649 0.0479870987618255 7.57250069878542 7.57250068295881 2512367.991190191 3.20035778761596 1229.2957028844 44.1836600469516 -36.80427531138 97391.6970506831 T 30 CATAB v2.0f-lin.ifort 2020-Nov-13 03:17:00 2020-Nov-13 03:17

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