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20008 (1991 NG3)
Classification: Main-belt Asteroid          SPK-ID: 2020008
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1964271463260232 4.6249e-08  
a 2.564689529184811 1.0329e-08 au
q 2.060914883754806 1.2212e-07 au
i 11.4601100460935 2.7694e-06 deg
node 267.4589486588938 2.203e-05 deg
peri 75.53114088091149 2.3719e-05 deg
M 25.71634533205082 7.3485e-06 deg
tp 2459093.333913047766
(2020-Aug-31.83391305)
3.0803e-05 TDB
period 1500.205056537391
4.11
9.0629e-06
2.481e-08
d
yr
n .239967195438544 1.4497e-09 deg/d
Q 3.068464174614815 1.2358e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2396  
   data-arc span      18007 days (49.30 yr)  
   first obs. used      1971-11-11  
   last obs. used      2021-02-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3954  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:11:18  

Additional Information
 Earth MOID = 1.08581 au 
 Jupiter MOID = 2.42363 au 
 T_jup = 3.378 
[ 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 13.66   n/a E2021B10  
diameter diameter 5.570 km 0.286 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 257.648 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.272   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20008 (1991 NG3)          Discovered 1991-Jul-04 by Debehogne, H. at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1991 NG3 = 1971 VC1 = 1999 LS25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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