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JPL Small-Body Database Browser
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273 Atropos
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 79 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1601443084105446 3.1583e-08  
a 2.395428159414233 6.5738e-09 au
q 2.011813973477697 7.5061e-08 au
i 20.44875055845032 4.3638e-06 deg
node 158.9197516293319 1.0608e-05 deg
peri 121.0582842383887 1.7589e-05 deg
M 140.2131711663393 1.4422e-05 deg
tp 2458473.076515391289
(2018-Dec-20.57651539)
5.3551e-05 TDB
period 1354.169889174564
3.71
5.5744e-06
1.526e-08
d
yr
n .2658455212140616 1.0943e-09 deg/d
Q 2.779042345350769 7.6265e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2861  
   data-arc span      40178 days (110.00 yr)  
   first obs. used      1910-02-02  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37416  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:22:44  

Additional Information
 Earth MOID = 1.06123 au 
 Jupiter MOID = 2.64517 au 
 T_jup = 3.427 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.5   n/a MPO502155 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. 2019-August); 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          Discovered 1888-Mar-08 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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