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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 186 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6392575981202799 3.8327e-08  
a 1.92432095248221 3.0435e-09 au
q .6941841623859031 7.3782e-08 au
i 10.76129041159392 4.574e-06 deg
node 41.47102708953345 1.8722e-05 deg
peri 102.4753062885914 1.8995e-05 deg
M 83.07533488404046 3.494e-06 deg
tp 2458975.499082211931
(2020-May-05.99908221)
9.1141e-06 TDB
period 975.0226167221359
2.67
2.3132e-06
6.333e-09
d
yr
n .369222204516917 8.7595e-10 deg/d
Q 3.154457742578517 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49063  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-18 06:26:02  

Additional Information
 Earth MOID = .00306656 au 
 Jupiter MOID = 1.98561 au 
 T_jup = 3.623 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457520.5 (2016-May-12.0) TDB
Reference: JPL 186 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6393969111319207 3.8335e-08  
q .6937480270602611 7.3857e-08 au
tp 2458001.136662213705
(2017-Sep-04.63666221)
7.7327e-06 TDB
node 41.50124306492285 1.872e-05 deg
peri 102.4551153572059 1.8992e-05 deg
i 10.7635923248879 4.5747e-06 deg
  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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49063  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-18 06:26:02  

Additional Information
 Jupiter MOID = 1.98561 au 
 T_jup = 3.623 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.46960747974291E-15 -2.8310055471123E-15 -2.230377537805328E-13 -6.269528229927352E-14 1.160561971281894E-13 1.548106328522397E-14
q -2.8310055471123E-15 5.454815755254631E-15 4.333671009635843E-13 1.191934383896434E-13 -2.210902233404708E-13 -2.94636860121483E-14
tp -2.230377537805328E-13 4.333671009635843E-13 5.979515495099405E-11 -9.865071267019418E-12 1.957207705568028E-11 1.83004632836591E-12
node -6.269528229927352E-14 1.191934383896434E-13 -9.865071267019418E-12 3.504422608904705E-10 -3.455992170113626E-10 -1.26205257140554E-11
peri 1.160561971281894E-13 -2.210902233404708E-13 1.957207705568028E-11 -3.455992170113626E-10 3.60686430008426E-10 1.32641787514513E-11
i 1.548106328522397E-14 -2.94636860121483E-14 1.83004632836591E-12 -1.26205257140554E-11 1.32641787514513E-11 2.092773727465971E-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 15.66   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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