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187787 (1998 SR168)
Classification: Main-belt Asteroid          SPK-ID: 2187787
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .285204803963309 3.3179e-08  
a 3.082683558908359 1.9801e-08 au
q 2.203487398808985 9.4856e-08 au
i 7.08610077712915 3.9291e-06 deg
node 116.0867052981897 2.6448e-05 deg
peri 224.6612514737793 2.7825e-05 deg
M 47.78179273136291 7.1867e-06 deg
tp 2458938.107277629097
(2020-Mar-29.60727763)
3.8357e-05 TDB
period 1976.932522908933
5.41
1.9048e-05
5.215e-08
d
yr
n .1821002972171668 1.7545e-09 deg/d
Q 3.961879719007734 2.5449e-08 au
  Orbit Determination Parameters
   # obs. used (total)      586  
   data-arc span      8675 days (23.75 yr)  
   first obs. used      1997-05-09  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51202  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:56:50  

Additional Information
 Earth MOID = 1.1996 au 
 Jupiter MOID = 1.47279 au 
 T_jup = 3.152 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457703.5 (2016-Nov-11.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2885254521641625 3.2797e-08  
q 2.189768584915491 9.3649e-08 au
tp 2456965.072347400322
(2014-Nov-03.57234740)
3.4708e-05 TDB
node 116.2494700187733 2.6507e-05 deg
peri 224.8292140544885 2.785e-05 deg
i 7.084439649721764 3.9278e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      586  
   data-arc span      8675 days (23.75 yr)  
   first obs. used      1997-05-09  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51202  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:56:50  

Additional Information
 Jupiter MOID = 1.47279 au 
 T_jup = 3.152 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.075668504065247E-15 -3.04893736475587E-15 -2.791835019688423E-13 3.198083683541751E-15 -4.530488649380161E-14 -2.003153473093415E-15
q -3.04893736475587E-15 8.770054040968104E-15 8.009448431226098E-13 -9.186430880102841E-15 1.450494980312529E-13 5.616685300485517E-15
tp -2.791835019688423E-13 8.009448431226098E-13 1.204644674554793E-9 -7.380404658360549E-12 3.017746131434114E-10 -1.018585047718786E-12
node 3.198083683541751E-15 -9.186430880102841E-15 -7.380404658360549E-12 7.026156214605439E-10 -6.986356066691603E-10 -1.001073568278009E-11
peri -4.530488649380161E-14 1.450494980312529E-13 3.017746131434114E-10 -6.986356066691603E-10 7.756457721896281E-10 9.565512564038051E-12
i -2.003153473093415E-15 5.616685300485517E-15 -1.018585047718786E-12 -1.001073568278009E-11 9.565512564038051E-12 1.542796628709735E-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 15.59   n/a MPCxxxxx  
diameter diameter 5.021 km 0.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.044   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

187787 (1998 SR168)          Discovered 1998-Sep-17 by LONEOS at Anderson Mesa
Reference: 20080618/Numbers.arcLast Updated: 2008-06-20

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Alternate Designations
 1998 SR168 = 2006 BW233 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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