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99907 (1989 VA)
Classification: Aten [NEO]          SPK-ID: 2099907
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 79 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5946802690559215 9.7103e-08  
a .728432218956297 1.1073e-09 AU
q .2952479509983643 7.0609e-08 AU
i 28.79771515412361 1.5595e-05 deg
node 225.6055580918472 5.1973e-06 deg
peri 2.840806077198057 1.3762e-05 deg
M 293.9065271240543 4.286e-05 deg
tp 2457042.190607013844
(2015-Jan-19.69060701)
2.7098e-05 JED
period 227.0817052260858
0.62
5.1778e-07
1.418e-09
d
yr
n 1.585332467190956 3.6148e-09 deg/d
Q 1.16161648691423 1.7658e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      547  
   data-arc span      8453 days (23.14 yr)  
   first obs. used      1989-11-02  
   last obs. used      2012-12-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57364  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-10 19:59:22  

Additional Information
 Earth MOID = .155094 AU 
 T_jup = 7.670 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.9 mag n/a MPO251027  
diameter diameter 1.4 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
rotation period rot_per 2.514 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L.; Mottola, S.; et al. (1997) Icarus 130, 275-286.]
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

99907 (1989 VA)          Discovered 1989-Nov-02 by Shoemaker, C. S. at Palomar (675)
Reference: 20050622/Numbers.arcLast Updated: 2005-06-27

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