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133 Cyrene (A873 QA)
Classification: Main-belt Asteroid          SPK-ID: 2000133
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 81 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1350810446243512 3.5602e-08  
a 3.064773156926019 1.3101e-08 au
q 2.650780397351782 1.0774e-07 au
i 7.213926181096664 4.4257e-06 deg
node 319.0033756432333 3.2158e-05 deg
peri 290.1583770227697 3.6591e-05 deg
M 249.7517391275637 1.9818e-05 deg
tp 2459800.657415024824
(2022-Aug-09.15741502)
0.00010964 TDB
period 1959.728595255818
5.37
1.2566e-05
3.44e-08
d
yr
n .1836989065075139 1.1779e-09 deg/d
Q 3.478765916500256 1.4871e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3486  
   data-arc span      53848 days (147.43 yr)  
   first obs. used      1873-08-17  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39388  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:43:43  

Additional Information
 Earth MOID = 1.6463 au 
 Jupiter MOID = 1.65893 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 7.88   n/a E2020-QM5 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. 2020-October); 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.]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
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 (A873 QA)          Discovered 1873-Aug-16 by Watson, J. C. at Ann Arbor
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A873 QA = 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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