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136564 (1977 VA)
Classification: Amor [NEO]          SPK-ID: 2136564
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 59 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3944018523855465 8.6696e-08  
a 1.865751214349337 2.6835e-09 au
q 1.129895479319375 1.6156e-07 au
i 2.984514946065539 6.1054e-06 deg
node 224.48728660 8.9067e-05 deg
peri 172.6058813564034 9.3803e-05 deg
M 257.3286258584204 1.4439e-05 deg
tp 2459265.976388019174
(2021-Feb-20.47638802)
3.7627e-05 TDB
period 930.8485494224871
2.55
2.0083e-06
5.498e-09
d
yr
n .3867439018123299 8.3439e-10 deg/d
Q 2.601606949379298 3.7419e-09 au
  Orbit Determination Parameters
   # obs. used (total)      271  
   data-arc span      15115 days (41.38 yr)  
   first obs. used      1977-10-11  
   last obs. used      2019-02-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45833  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Mar-01 07:05:11  

Additional Information
 Earth MOID = .137507 au 
 Jupiter MOID = 2.83146 au 
 T_jup = 3.888 
[ 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 19.1   n/a MPO196526  
diameter diameter 0.4 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
B-V BV 0.705   0.056 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=8.90, mean=9.08, max.=9.28) deg.
U-B UB 0.205   0.057 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=8.90, mean=9.06, max.=9.23) deg.
Tholen spectral type spec_T XC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

136564 (1977 VA)          Discovered 1977-Nov-07 by Helin, E. F., Shoemaker, E. M. at Palomar
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

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