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181180 (2005 ST81)
Classification: Main-belt Asteroid          SPK-ID: 2181180
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06410169866641487 5.0449e-08  
a 3.093638935701071 3.23e-08 au
q 2.895331424862072 1.4127e-07 au
i 8.656845408033497 6.8016e-06 deg
node 10.37141893764741 3.2165e-05 deg
peri 82.69983518758977 6.23e-05 deg
M 212.0117922398792 5.317e-05 deg
tp 2460017.510191895373
(2023-Mar-14.01019190)
0.00029562 TDB
period 1987.480445462853
5.44
3.1127e-05
8.522e-08
d
yr
n .181133857604401 2.8368e-09 deg/d
Q 3.291946446540069 3.4371e-08 au
  Orbit Determination Parameters
   # obs. used (total)      294  
   data-arc span      6301 days (17.25 yr)  
   first obs. used      2002-02-06  
   last obs. used      2019-05-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50203  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:29:32  

Additional Information
 Earth MOID = 1.92822 au 
 Jupiter MOID = 1.84274 au 
 T_jup = 3.203 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456982.5 (2014-Nov-21.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06796583478969991 5.1191e-08  
q 2.876673930265262 1.4493e-07 au
tp 2456043.878730971213
(2012-Apr-26.37873097)
0.00026875 TDB
node 10.63609368010499 3.217e-05 deg
peri 80.97117658853362 5.912e-05 deg
i 8.662360812734848 6.8071e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      294  
   data-arc span      6301 days (17.25 yr)  
   first obs. used      2002-02-06  
   last obs. used      2019-05-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50203  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:29:32  

Additional Information
 Jupiter MOID = 1.84274 au 
 T_jup = 3.203 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.620522939969599E-15 -7.311010465192049E-15 -2.386849578535674E-12 -4.193269789715669E-15 -3.767561506062069E-13 -1.560599102379039E-15
q -7.311010465192049E-15 2.100528266860361E-14 7.341181528505404E-12 9.159837501104236E-15 1.234361442637586E-12 5.002083140253576E-15
tp -2.386849578535674E-12 7.341181528505404E-12 7.222443207937471E-8 2.56978768011224E-11 1.333262441090453E-8 -1.900677075649321E-12
node -4.193269789715669E-15 9.159837501104236E-15 2.56978768011224E-11 1.034938157842234E-9 -1.018682238287638E-9 2.346645838005263E-11
peri -3.767561506062069E-13 1.234361442637586E-12 1.333262441090453E-8 -1.018682238287638E-9 3.495185368713898E-9 -2.349248996317385E-11
i -1.560599102379039E-15 5.002083140253576E-15 -1.900677075649321E-12 2.346645838005263E-11 -2.349248996317385E-11 4.633621753888651E-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 15.5   n/a MPO436895  
diameter diameter 5.367 km 0.478 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.035   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

181180 (2005 ST81)          Discovered 2005-Sep-24 by Spacewatch at Kitt Peak
Reference: 20080321/Numbers.arcLast Updated: 2008-03-26

[ show close-approach data ]
Alternate Designations
 2005 ST81 = 2002 CD35 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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