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43815 (1991 VD4)
Classification: Main-belt Asteroid          SPK-ID: 2043815
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .262296497117207 2.1101e-08  
a 3.16524769803041 1.733e-08 au
q 2.33501431432873 7.1476e-08 au
i 24.17241723537764 4.1156e-07 deg
node 256.6924684801681 2.3091e-06 deg
peri 160.1256728058781 3.6853e-06 deg
M 39.62190695127843 4.0269e-06 deg
tp 2458974.117499674031
(2020-May-04.61749967)
2.1359e-05 TDB
period 2056.884849524371
5.63
1.6892e-05
4.625e-08
d
yr
n .1750219513179095 1.4374e-09 deg/d
Q 3.995481081732089 2.1875e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2721  
   data-arc span      10733 days (29.39 yr)  
   first obs. used      1991-11-03  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3168  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 05:27:05  

Additional Information
 Earth MOID = 1.35881 au 
 Jupiter MOID = 1.39283 au 
 T_jup = 3.017 
[ 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 12.07   n/a E2021B10  
diameter diameter 13.696 km 0.187 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.4423 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Clark, M. (2020) Minor Planet Bull. 47, 163-165.]
geometric albedo albedo 0.136   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

43815 (1991 VD4)          Discovered 1991-Nov-03 by Helin, E. F. at Palomar
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

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