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JPL Small-Body Database Browser
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133 Cyrene
Classification: Main-belt Asteroid          SPK-ID: 2000133
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 70 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1354922548957423 3.7649e-08  
a 3.06387924387927 1.4305e-08 au
q 2.648747336397806 1.1269e-07 au
i 7.213056375434031 5.0378e-06 deg
node 319.0199409620526 3.467e-05 deg
peri 290.0113213763751 3.9682e-05 deg
M 139.691346858374 2.0479e-05 deg
tp 2457840.396210716659
(2017-Mar-27.89621072)
0.00010998 TDB
period 1958.871256495435
5.36
1.3718e-05
3.756e-08
d
yr
n .1837793059683088 1.287e-09 deg/d
Q 3.479011151360734 1.6243e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2809  
   data-arc span      53328 days (146.00 yr)  
   first obs. used      1873-08-17  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42094  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:05:21  

Additional Information
 Earth MOID = 1.64564 au 
 Jupiter MOID = 1.65941 au 
 T_jup = 3.207 
[ 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 7.98   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 15
magnitude slope G 0.13   n/a PDS3 (MPC 17257) Fit
diameter diameter 72.175 km 0.932 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.708 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Lagerkvist, C.-I. (1980) Messenger 22, 5-7.]
[Harris, A.W.; Carlsson, M.; Young, J.; Lagerkvist, C.-I. (1984) Icarus 58, 377-382.]
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Buchheim, R.K. (2006) Minor Planet Bull. 33, 29-30.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.279   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.907   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=8; phase (min.=2.79, mean=9.25, max.=12.28) deg.
U-B UB 0.510   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=2.79, mean=9.19, max.=12.28) deg.
Tholen spectral type spec_T SR   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B S   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)

133 Cyrene          Discovered 1873-Aug-16 by Watson, J. C. at Ann Arbor
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1936 HO = 1948 QC = 1959 UR = A910 NB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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