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20179 (1996 XX31)
Classification: Main-belt Asteroid          SPK-ID: 2020179
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1449739611958713 1.1587e-08  
a 2.377496682416096 8.0958e-09 au
q 2.032821570636192 3.0711e-08 au
i 12.32280806383165 4.0496e-07 deg
node 349.4793693184329 4.9435e-06 deg
peri 296.0756510341287 9.9709e-06 deg
M 6.730545703643191 1.121e-05 deg
tp 2459175.466240066584
(2020-Nov-21.96624007)
4.1659e-05 TDB
period 1338.992998911164
3.67
6.8393e-06
1.872e-08
d
yr
n .2688587619896018 1.3733e-09 deg/d
Q 2.722171794196 9.2695e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2003  
   data-arc span      9666 days (26.46 yr)  
   first obs. used      1994-03-06  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46588  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:14:39  

Additional Information
 Earth MOID = 1.04887 au 
 Jupiter MOID = 2.55266 au 
 T_jup = 3.495 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.75   n/a E2021B10  
diameter diameter 7.218 km 0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.594 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.144   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20179 (1996 XX31)          Discovered 1996-Dec-12 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 XX31 = 1998 FO114 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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