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70973 (1999 XY20)
Classification: Main-belt Asteroid          SPK-ID: 2070973
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1303265147947693 4.7564e-08  
a 2.363435291122125 9.5958e-09 au
q 2.055417006687218 1.1373e-07 au
i 7.804878847537951 4.9457e-06 deg
node 48.72684293093689 3.6706e-05 deg
peri 347.7571640293233 4.1214e-05 deg
M 233.7678970845387 1.8979e-05 deg
tp 2459465.851713736352
(2021-Sep-08.35171374)
7.0717e-05 TDB
period 1327.13163352179
3.63
8.0825e-06
2.213e-08
d
yr
n .2712617127847923 1.652e-09 deg/d
Q 2.671453575557033 1.0846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1495  
   data-arc span      7662 days (20.98 yr)  
   first obs. used      1998-05-18  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47209  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:36:04  

Additional Information
 Earth MOID = 1.06357 au 
 Jupiter MOID = 2.73545 au 
 T_jup = 3.526 
[ 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 14.5   n/a MPO474589  
diameter diameter 3.281 km 0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 13.28886 h n/a LCDB (Rev. 2019-August); 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 0.313   0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

70973 (1999 XY20)          Discovered 1999-Dec-05 by LINEAR at Socorro
Reference: 20031109/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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