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JPL Small-Body Database Browser
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59491 (1999 JO4)
Classification: Main-belt Asteroid          SPK-ID: 2059491
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2601612233759872 3.8043e-08  
a 2.304646585742705 1.1157e-08 au
q 1.705066910546591 8.3566e-08 au
i 11.70778080053804 4.8355e-06 deg
node 238.6212164318005 2.21e-05 deg
peri 60.77601063719219 2.4987e-05 deg
M 320.341915781184 1.3419e-05 deg
tp 2459141.277795918533
(2020-Oct-18.77779592)
4.8196e-05 TDB
period 1277.92372044604
3.50
9.2799e-06
2.541e-08
d
yr
n .2817069549928593 2.0457e-09 deg/d
Q 2.904226260938819 1.406e-08 au
  Orbit Determination Parameters
   # obs. used (total)      978  
   data-arc span      9325 days (25.53 yr)  
   first obs. used      1993-08-15  
   last obs. used      2019-02-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48635  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 12:48:17  

Additional Information
 Earth MOID = .724439 au 
 Jupiter MOID = 2.38127 au 
 T_jup = 3.516 
[ 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 14.8   n/a MPO365938  
diameter diameter 2.845 km 0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.113 h n/a LCDB (Rev. 2019-August); 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.]
geometric albedo albedo 0.248   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

59491 (1999 JO4)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20030614/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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