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20446 (1999 JB80)
Classification: Mars-crossing Asteroid          SPK-ID: 2020446
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3368288191808052 1.5005e-08  
a 2.302339500621961 6.7381e-09 au
q 1.526845205274141 3.5332e-08 au
i 22.55646483788509 6.0666e-07 deg
node 81.19507511455834 3.1228e-06 deg
peri 277.3822461395281 3.841e-06 deg
M 351.052164379207 5.7411e-06 deg
tp 2459232.215237663203
(2021-Jan-17.71523766)
2.0423e-05 TDB
period 1276.005286934555
3.49
5.6016e-06
1.534e-08
d
yr
n .2821304924722182 1.2385e-09 deg/d
Q 3.07783379596978 9.0076e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1613  
   data-arc span      24065 days (65.89 yr)  
   first obs. used      1955-01-15  
   last obs. used      2020-12-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47589  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:21:17  

Additional Information
 Earth MOID = .699626 au 
 Jupiter MOID = 2.79908 au 
 T_jup = 3.417 
[ 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 13.96   n/a E2021B10  
rotation period rot_per 6.3961 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Skiff, B.A. (2018) Posting on CALL web site: http://www.minorplanet.info/call.html]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.]

20446 (1999 JB80)          Discovered 1999-May-14 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JB80 = 1989 WN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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