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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 171 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6392806864422543 3.9854e-08  
a 1.923493652477713 3.1412e-09 au
q .6938413099544417 7.6786e-08 au
i 10.76429299677127 4.6087e-06 deg
node 41.49015309318185 1.917e-05 deg
peri 102.448096370055 1.9431e-05 deg
M 221.450255452451 3.3116e-06 deg
tp 2458975.505633292198
(2020-May-06.00563329)
9.5545e-06 TDB
period 974.3939148069667
2.67
2.3869e-06
6.535e-09
d
yr
n .3694604353838952 9.0503e-10 deg/d
Q 3.153145995000985 5.1493e-09 au
  Orbit Determination Parameters
   # obs. used (total)      656  
   # delay obs. used      2  
   # Doppler obs. used      0  
   data-arc span      7740 days (21.19 yr)  
   first obs. used      1998-09-29  
   last obs. used      2019-12-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50364  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-09 05:13:37  

Additional Information
 Earth MOID = .00272183 au 
 Jupiter MOID = 1.98894 au 
 T_jup = 3.624 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457413.5 (2016-Jan-26.0) TDB
Reference: JPL 171 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6394468801507102 3.9884e-08  
q .6936259541167396 7.6868e-08 au
tp 2457026.470786452600
(2015-Jan-03.97078645)
7.2343e-06 TDB
node 41.5060664191515 1.9175e-05 deg
peri 102.4474089562682 1.9435e-05 deg
i 10.76347755824708 4.6082e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      656  
   # delay obs. used      2  
   # Doppler obs. used      0  
   data-arc span      7740 days (21.19 yr)  
   first obs. used      1998-09-29  
   last obs. used      2019-12-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50364  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-09 05:13:37  

Additional Information
 Jupiter MOID = 1.98894 au 
 T_jup = 3.624 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.590705551379559E-15 -3.065426506512698E-15 -2.391247279260272E-13 -6.802467919037399E-14 1.194358542035861E-13 1.566011320474344E-14
q -3.065426506512698E-15 5.908619971148028E-15 4.619434343864791E-13 1.293942345061254E-13 -2.27516709861661E-13 -2.979169211216687E-14
tp -2.391247279260272E-13 4.619434343864791E-13 5.233455176081552E-11 -6.772670312740968E-12 1.546642787995475E-11 1.188038714726231E-12
node -6.802467919037399E-14 1.293942345061254E-13 -6.772670312740968E-12 3.676852865378586E-10 -3.6258861138581E-10 -1.317432399822879E-11
peri 1.194358542035861E-13 -2.27516709861661E-13 1.546642787995475E-11 -3.6258861138581E-10 3.777233539563573E-10 1.38073355725913E-11
i 1.566011320474344E-14 -2.979169211216687E-14 1.188038714726231E-12 -1.317432399822879E-11 1.38073355725913E-11 2.123559807032234E-11

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 15.6   n/a MPO344892  
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. 2019-January); 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 Macias, A.; 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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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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