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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 109 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09877041552629694 3.3404e-08  
a 2.774009807874813 1.0102e-08 au
q 2.500019706476994 9.3877e-08 au
i 6.003036192458785 3.6431e-06 deg
node 73.73849063303379 3.5619e-05 deg
peri 196.9324812028178 4.1113e-05 deg
M 308.3580498986087 2.2804e-05 deg
tp 2459442.580912764172
(2021-Aug-16.08091276)
0.00010744 TDB
period 1687.564633481068
4.62
9.218e-06
2.524e-08
d
yr
n .2133251626975617 1.1652e-09 deg/d
Q 3.047999909272631 1.1099e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3356  
   data-arc span      41346 days (113.20 yr)  
   first obs. used      1907-11-07  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39357  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:44:59  

Additional Information
 Earth MOID = 1.48285 au 
 Jupiter MOID = 2.02526 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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