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9950 ESA (1990 VB)
Classification: Amor [NEO]          SPK-ID: 2009950
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 161 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5330345807361124 3.6686e-08  
a 2.43703583439428 9.7975e-09 au
q 1.138011460169043 8.9631e-08 au
i 14.59746332599761 6.2003e-06 deg
node 253.512708942564 1.5709e-05 deg
peri 103.5048737618261 1.6773e-05 deg
M 276.9508323361458 5.8532e-06 deg
tp 2459321.070890064822
(2021-Apr-16.57089006)
2.4093e-05 TDB
period 1389.604780754043
3.80
8.3799e-06
2.294e-08
d
yr
n .2590664662254923 1.5623e-09 deg/d
Q 3.736060208619516 1.502e-08 au
  Orbit Determination Parameters
   # obs. used (total)      725  
   data-arc span      10813 days (29.60 yr)  
   first obs. used      1990-11-08  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44661  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-02 06:25:54  

Additional Information
 Earth MOID = .280124 au 
 Jupiter MOID = 2.10115 au 
 T_jup = 3.256 
[ 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 16.1   n/a MPO435794  
rotation period rot_per 6.712 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2014) Minor Planet Bull. 41, 92-95.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 41-47.]
[Vaduvescu, O.; Aznar Macias, A.; Tudor, V.; Predatu, M.; et al. (2017) Earth, Moon, and Planets 120, 41-100.]

9950 ESA           Discovered 1990 Nov. 8 by C. Pollas at Caussols.
ESA is an acronym for the European Space Agency. This agency, formed in 1974, manages impressive scientific missions devoted to the exploration of the solar system and the advancement of astronomy. The name was suggested by J.-L. Heudier.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051215/MPCPages.arcLast Updated: 2006-03-22

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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