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267 Tirza (A887 KB)
Classification: Main-belt Asteroid          SPK-ID: 2000267
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 114 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09882567801234815 2.4947e-08  
a 2.773982314855124 8.7986e-09 au
q 2.499841631795304 7.1869e-08 au
i 6.003020676836217 4.0007e-07 deg
node 73.73802867646934 4.5942e-06 deg
peri 196.9991813003165 6.7628e-06 deg
M 350.1171639201239 1.0277e-05 deg
tp 2459442.826879741290
(2021-Aug-16.32687974)
4.8243e-05 TDB
period 1687.53954553837
4.62
8.0288e-06
2.198e-08
d
yr
n .2133283341132906 1.015e-09 deg/d
Q 3.048122997914945 9.6681e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3621  
   data-arc span      41506 days (113.64 yr)  
   first obs. used      1907-11-07  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38555  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:48:39  

Additional Information
 Earth MOID = 1.48439 au 
 Jupiter MOID = 2.02416 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 10.28   n/a E2021B10  
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. 2020-October); 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 (A887 KB)          Discovered 1887-May-27 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A887 KB = 1965 GC = A922 AA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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