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22256 (1978 VP9)
Classification: Main-belt Asteroid          SPK-ID: 2022256
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1344046669626697 3.3869e-08  
a 2.33283743967624 8.5323e-09 au
q 2.019293200518508 8.0264e-08 au
i 6.372987251221883 3.8797e-06 deg
node 237.1780456085152 3.3449e-05 deg
peri 83.74775164120381 3.6402e-05 deg
M 22.32964113414967 1.4352e-05 deg
tp 2459119.775681996530
(2020-Sep-27.27568200)
5.1838e-05 TDB
period 1301.442970205438
3.56
7.14e-06
1.955e-08
d
yr
n .2766160394590111 1.5176e-09 deg/d
Q 2.646381678833972 9.6791e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1194  
   data-arc span      15393 days (42.14 yr)  
   first obs. used      1978-11-05  
   last obs. used      2020-12-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54726  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:02:53  

Additional Information
 Earth MOID = 1.01671 au 
 Jupiter MOID = 2.63789 au 
 T_jup = 3.549 
[ 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 15.37   n/a E2021B10  

22256 (1978 VP9)          Discovered 1978-Nov-07 by Helin, E. F., Bus, S. J. at Palomar
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1978 VP9 = 1998 HH29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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