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273 Atropos (A888 EA)
Classification: Main-belt Asteroid          SPK-ID: 2000273
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1599399506693577 1.5772e-08  
a 2.395773533563176 5.8204e-09 au
q 2.012593632790129 3.7032e-08 au
i 20.45078033357002 9.2067e-07 deg
node 158.9115561115964 3.3553e-06 deg
peri 121.1355307296606 7.4157e-06 deg
M 245.3769902157404 5.7308e-06 deg
tp 2459827.757219482426
(2022-Sep-05.25721948)
2.2166e-05 TDB
period 1354.462767169399
3.71
4.9359e-06
1.351e-08
d
yr
n .2657880369442269 9.6858e-10 deg/d
Q 2.778953434336224 6.7513e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3466  
   data-arc span      40679 days (111.37 yr)  
   first obs. used      1910-02-02  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35297  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:49:02  

Additional Information
 Earth MOID = 1.06134 au 
 Jupiter MOID = 2.6432 au 
 T_jup = 3.427 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456858.5 (2014-Jul-20.0) TDB
Reference: JPL 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1600341301198087 1.572e-08  
q 2.011633248123388 3.6886e-08 au
tp 2457120.037636634929
(2015-Apr-07.53763663)
2.0196e-05 TDB
node 158.9612140341295 3.3554e-06 deg
peri 121.2385179324058 7.4293e-06 deg
i 20.45374326310146 9.2042e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3466  
   data-arc span      40679 days (111.37 yr)  
   first obs. used      1910-02-02  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35297  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:49:02  

Additional Information
 Jupiter MOID = 2.6432 au 
 T_jup = 3.427 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.471274012026737E-16 -5.750173217272784E-16 -7.173505910176234E-14 6.803489573238109E-16 -3.965942186826987E-14 -6.99881930146233E-16
q -5.750173217272784E-16 1.360571470766827E-15 1.681270700584892E-13 -1.967734791833131E-15 9.326217041019507E-14 1.753858045306311E-15
tp -7.173505910176234E-14 1.681270700584892E-13 4.07896866753892E-10 7.922150260765228E-12 1.354469410737933E-10 -2.04527142010497E-12
node 6.803489573238109E-16 -1.967734791833131E-15 7.922150260765228E-12 1.12586769877861E-11 -7.227217331067191E-12 -1.716423353998977E-12
peri -3.965942186826987E-14 9.326217041019507E-14 1.354469410737933E-10 -7.227217331067191E-12 5.519467299804493E-11 8.227487576049696E-13
i -6.99881930146233E-16 1.753858045306311E-15 -2.04527142010497E-12 -1.716423353998977E-12 8.227487576049696E-13 8.471678816448128E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.51   n/a MPO614063 IRAS observations used: 7
diameter diameter 29.768 km 0.480 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 23.924 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2007) Minor Planet Bull. 34, 104-107.]
[Pilcher, Frederick; Alvarez, Eduardo A.; Ferrero, Andrea; Inasaridze, Raguli Ya.; et al. (2013) Minor Planet Bull. 40, 81-82.]
geometric albedo albedo 0.212   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.760   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=8.14, mean=9.09, max.=10.01) deg.
U-B UB 0.374   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=8.14, mean=9.09, max.=10.01) deg.
Tholen spectral type spec_T SCTU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

273 Atropos (A888 EA)          Discovered 1888-Mar-08 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A888 EA = A910 CC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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