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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5946866924769665 9.438e-08  
a .7284224328638652 1.0611e-09 au
q .295239305538028 6.8643e-08 au
i 28.79887048899906 1.516e-05 deg
node 225.602832387847 5.1318e-06 deg
peri 2.842902978067896 1.3071e-05 deg
M 208.0519411177175 4.1023e-05 deg
tp 2457496.344247201948
(2016-Apr-17.84424720)
2.6012e-05 JED
period 227.0771291618301
0.62
4.9618e-07
1.358e-09
d
yr
n 1.585364414852366 3.4641e-09 deg/d
Q 1.161605560189702 1.6921e-09 au
  Orbit Determination Parameters
   # obs. used (total)      566  
   data-arc span      9555 days (26.16 yr)  
   first obs. used      1989-11-02  
   last obs. used      2015-12-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59304  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 16:45:48  

Additional Information
 Earth MOID = .154301 au 
 Jupiter MOID = 3.82513 au 
 T_jup = 7.671 
[ 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 LCDB (Rev. 2015-December); Warner et al., 2009 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
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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