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20700 (1999 VG145)
Classification: Main-belt Asteroid          SPK-ID: 2020700
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .116833976946577 3.7421e-08  
a 2.539960217334281 1.1265e-08 au
q 2.243206563857025 9.1887e-08 au
i 15.37870141414473 3.6758e-06 deg
node 11.53158029978163 1.9298e-05 deg
peri 358.2102883912645 3.0296e-05 deg
M 70.51014442646211 2.4091e-05 deg
tp 2458910.907105312265
(2020-Mar-02.40710531)
9.8758e-05 TDB
period 1478.559474464201
4.05
9.8367e-06
2.693e-08
d
yr
n .243480229383709 1.6198e-09 deg/d
Q 2.836713870811536 1.2582e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1469  
   data-arc span      10775 days (29.50 yr)  
   first obs. used      1991-09-14  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49951  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:27:28  

Additional Information
 Earth MOID = 1.24151 au 
 Jupiter MOID = 2.62624 au 
 T_jup = 3.387 
[ 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 14.44   n/a MPCxxxxx  
diameter diameter 3.577 km 0.892 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.706628 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.288   0.147 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20700 (1999 VG145)          Discovered 1999-Nov-08 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 VG145 = 1991 RN20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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