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187250 (2005 SQ221)
Classification: Main-belt Asteroid          SPK-ID: 2187250
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1818043892405093 1.2504e-07  
a 3.149109680554108 3.5623e-08 au
q 2.576587718429594 4.0549e-07 au
i 23.39007643193975 1.3803e-05 deg
node 16.12761946494964 1.6821e-05 deg
peri 340.3822969697061 3.1512e-05 deg
M 321.0908112975384 2.503e-05 deg
tp 2459617.112330256993
(2022-Feb-06.61233026)
0.00014286 TDB
period 2041.174373998005
5.59
3.4635e-05
9.483e-08
d
yr
n .1763690572378075 2.9927e-09 deg/d
Q 3.721631642678623 4.21e-08 au
  Orbit Determination Parameters
   # obs. used (total)      283  
   data-arc span      7560 days (20.70 yr)  
   first obs. used      1999-09-13  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55066  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:54:37  

Additional Information
 Earth MOID = 1.58322 au 
 Jupiter MOID = 1.7652 au 
 T_jup = 3.057 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457036.5 (2015-Jan-14.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .181143740216173 1.2556e-07  
q 2.577053158025721 4.0608e-07 au
tp 2457582.094798782572
(2016-Jul-12.59479878)
0.00013631 TDB
node 16.1833021708923 1.6822e-05 deg
peri 341.0834967017634 3.1356e-05 deg
i 23.39137307035716 1.3803e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      283  
   data-arc span      7560 days (20.70 yr)  
   first obs. used      1999-09-13  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55066  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:54:37  

Additional Information
 Jupiter MOID = 1.7652 au 
 T_jup = 3.057 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.576488320559146E-14 -5.086959329366854E-14 9.683785309269234E-12 -9.601012830937986E-14 1.789677112086537E-12 -4.560803057405375E-14
q -5.086959329366854E-14 1.649047729274829E-13 -3.034994835267312E-11 3.051223512307013E-13 -5.648733693049407E-12 1.498867017618722E-13
tp 9.683785309269234E-12 -3.034994835267312E-11 1.858003927902112E-8 -9.250449164851792E-11 3.625955375865436E-9 -4.583298111376294E-11
node -9.601012830937986E-14 3.051223512307013E-13 -9.250449164851792E-11 2.829953368261048E-10 -2.749497472967497E-10 4.954091624030348E-11
peri 1.789677112086537E-12 -5.648733693049407E-12 3.625955375865436E-9 -2.749497472967497E-10 9.831933435831799E-10 -5.430292054805111E-11
i -4.560803057405375E-14 1.498867017618722E-13 -4.583298111376294E-11 4.954091624030348E-11 -5.430292054805111E-11 1.905324405776594E-10

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 14.84   n/a E2021B55  
diameter diameter 6.157 km 0.291 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

187250 (2005 SQ221)          Discovered 2005-Sep-30 by CSS at Catalina
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

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