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85713 (1998 SS49)
Classification: Apollo [NEO, PHA]          SPK-ID: 2085713
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 184 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6392575982370078 3.8327e-08  
a 1.924320950843959 3.0436e-09 au
q .6941841615702947 7.3782e-08 au
i 10.761290340123 4.574e-06 deg
node 41.47102776801906 1.8722e-05 deg
peri 102.4753054444707 1.8995e-05 deg
M 83.0753359693647 3.4938e-06 deg
tp 2458975.499079559771
(2020-May-05.99907956)		 9.1136e-06 TDB
period 975.0226154770226
2.67		 2.3132e-06
6.333e-09		 d
yr
n .3692222049884173 8.7597e-10 deg/d
Q 3.154457740117623 4.9892e-09 au
   Orbit Determination Parameters
   # obs. used (total)      702  
   # delay obs. used      2  
   # Doppler obs. used      0  
   data-arc span      7955 days (21.78 yr)  
   first obs. used      1998-09-29  
   last obs. used      2020-07-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4909  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-10 05:21:45  

Additional Information
 Earth MOID = .00306656 au 
 Jupiter MOID = 1.98561 au 
 T_jup = 3.623 
[ 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 15.66   n/a E2021B10  
diameter diameter 3.484 km 0.789 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
rotation period rot_per 5.370 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:
[Warner, B.D. (2015) Minor Planet Bull. 42, 41-53.]
[Vaduvescu, O.; Aznar, A.M.; Tudor, V.; Predatu, M.; et al. (2017) Earth, Moon, and Planets 120, 41-100.]
geometric albedo albedo 0.076   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  

85713 (1998 SS49)          Discovered 1998-Sep-29 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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