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85839 (1998 YO4)
Classification: Amor [NEO]          SPK-ID: 2085839
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 280 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2480197341043318 4.1295e-08  
a 1.653729654417128 6.388e-09 au
q 1.243572065248143 6.9196e-08 au
i 9.321766627955043 4.6762e-06 deg
node 28.54306448108807 1.9385e-05 deg
peri 199.5617996012283 2.2295e-05 deg
M 250.2084988105442 1.9978e-05 deg
tp 2459237.398014400862
(2021-Jan-22.89801440)
4.4297e-05 TDB
period 776.7749257489961
2.13
4.5008e-06
1.232e-08
d
yr
n .463454712641341 2.6853e-09 deg/d
Q 2.063887243586112 7.9723e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1356  
   data-arc span      9771 days (26.75 yr)  
   first obs. used      1993-04-25  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45349  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-27 05:41:43  

Additional Information
 Earth MOID = .240566 au 
 Jupiter MOID = 2.92571 au 
 T_jup = 4.224 
[ 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 16.5   n/a MPO502667  
diameter diameter 1.140 km 0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
rotation period rot_per 2.45 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46-4, in press.]
geometric albedo albedo 0.405   0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  

85839 (1998 YO4)          Discovered 1998-Dec-17 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 YO4 = 1993 HZ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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