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181156 (2005 RS31)
Classification: Main-belt Asteroid          SPK-ID: 2181156
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1788259151138991 7.9172e-08  
a 3.021298096014849 4.0485e-08 au
q 2.481011699163113 2.5758e-07 au
i 17.66184306969563 6.4244e-06 deg
node 272.7109976693774 2.2016e-05 deg
peri 40.03902518941511 2.6989e-05 deg
M 4.783474082705315 1.9155e-05 deg
tp 2459175.012354568444
(2020-Nov-21.51235457)
0.0001017 TDB
period 1918.177499598981
5.25
3.8555e-05
1.056e-07
d
yr
n .1876781476559195 3.7723e-09 deg/d
Q 3.561584492866586 4.7725e-08 au
  Orbit Determination Parameters
   # obs. used (total)      349  
   data-arc span      9538 days (26.11 yr)  
   first obs. used      1994-06-04  
   last obs. used      2020-07-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46198  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:29:26  

Additional Information
 Earth MOID = 1.48908 au 
 Jupiter MOID = 1.74364 au 
 T_jup = 3.151 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457429.5 (2016-Feb-11.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1778774693262825 7.9212e-08  
q 2.48331104294791 2.567e-07 au
tp 2457261.495956824379
(2015-Aug-26.99595682)
8.1112e-05 TDB
node 272.7245464611125 2.2012e-05 deg
peri 40.64760125829607 2.7067e-05 deg
i 17.66268858259586 6.4215e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      349  
   data-arc span      9538 days (26.11 yr)  
   first obs. used      1994-06-04  
   last obs. used      2020-07-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46198  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:29:26  

Additional Information
 Jupiter MOID = 1.74364 au 
 T_jup = 3.151 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.274517537871353E-15 -2.02114265851855E-14 -4.191151652801016E-13 6.071952556294945E-14 -8.948362705572839E-14 -8.394551779885387E-15
q -2.02114265851855E-14 6.589259268095437E-14 2.378553232561435E-12 -1.914163118648135E-13 4.872202416903114E-13 3.207430836582074E-14
tp -4.191151652801016E-13 2.378553232561435E-12 6.579094480732501E-9 -4.012783675318412E-12 1.344241186317452E-9 6.333892679878868E-12
node 6.071952556294945E-14 -1.914163118648135E-13 -4.012783675318412E-12 4.845494331637667E-10 -4.619356156005892E-10 5.518891944911885E-11
peri -8.948362705572839E-14 4.872202416903114E-13 1.344241186317452E-9 -4.619356156005892E-10 7.326474251455527E-10 -5.144791591524459E-11
i -8.394551779885387E-15 3.207430836582074E-14 6.333892679878868E-12 5.518891944911885E-11 -5.144791591524459E-11 4.123502252397718E-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 14.85   n/a E2021B55  
diameter diameter 3.880 km 0.356 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.170   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

181156 (2005 RS31)          Discovered 2005-Sep-13 by LONEOS at Anderson Mesa
Reference: 20080321/Numbers.arcLast Updated: 2008-03-26

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