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JPL Small-Body Database Browser
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230 Athamantis
Classification: Main-belt Asteroid          SPK-ID: 2000230
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 92 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0615837213195746 2.4915e-08  
a 2.382303148758148 3.6975e-09 au
q 2.235592055546281 5.9647e-08 au
i 9.450957448584001 2.7558e-06 deg
node 239.8533239899891 2.0564e-05 deg
peri 140.1272946946367 3.5563e-05 deg
M 23.21224666399165 2.893e-05 deg
tp 2458513.901844833922
(2019-Jan-30.40184483)
0.0001079 TDB
period 1343.055513370419
3.68
3.1268e-06
8.561e-09
d
yr
n .268045509970451 6.2404e-10 deg/d
Q 2.529014241970015 3.9252e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2462  
   data-arc span      50089 days (137.14 yr)  
   first obs. used      1882-09-10  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53486  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:51:06  

Additional Information
 Earth MOID = 1.24762 au 
 Jupiter MOID = 2.74816 au 
 T_jup = 3.517 
[ show covariance matrix ]

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 7.35   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
magnitude slope G 0.27   n/a PDS3 (MPC 17258) Fit
diameter diameter 111.332 km 1.231 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 24.0055 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.]
[Zeigler, K.W.; Florence, W.B. (1985) Icarus 62, 512-517.]
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.]
[Harris, A.W.; Young, J.W.; Bowell, E.; Tholen, D.J. (1999) Icarus 142, 173-201.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.164   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.871   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=6.79, mean=16.53, max.=26.12) deg.
U-B UB 0.440   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=6.79, mean=18.98, max.=26.12) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Sl   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

230 Athamantis          Discovered 1882-Sep-03 by De Ball, K. at Bothkamp
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1949 WG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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