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JPL Small-Body Database Browser
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267 Tirza
Classification: Main-belt Asteroid          SPK-ID: 2000267
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 104 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09878618564379874 3.5095e-08  
a 2.774584269997345 1.0628e-08 au
q 2.500493673217024 9.7721e-08 au
i 6.002870364405062 3.9809e-06 deg
node 73.74262409176191 3.5874e-05 deg
peri 196.8079831022924 4.145e-05 deg
M 265.8179959754184 2.2926e-05 deg
tp 2459442.132202170619
(2021-Aug-15.63220217)
0.00010851 TDB
period 1688.088870352843
4.62
9.6995e-06
2.656e-08
d
yr
n .2132589144579534 1.2254e-09 deg/d
Q 3.048674866777667 1.1678e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2976  
   data-arc span      40998 days (112.25 yr)  
   first obs. used      1907-11-07  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40955  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:22:27  

Additional Information
 Earth MOID = 1.48511 au 
 Jupiter MOID = 2.0253 au 
 T_jup = 3.321 
[ 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 10.2   n/a MPO337242  
diameter diameter 55.998 km 0.637 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.648 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.051   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
Tholen spectral type spec_T DU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 1 color indices
SMASSII spectral type spec_B D   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)

267 Tirza          Discovered 1887-May-27 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1965 GC = A922 AA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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