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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 110 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09877042920682431 2.5787e-08  
a 2.774009806595593 9.2614e-09 au
q 2.500019667374207 7.4794e-08 au
i 6.003027304562528 4.0605e-07 deg
node 73.73847442756525 4.6475e-06 deg
peri 196.9324722570292 6.9748e-06 deg
M 308.3580746834616 1.0869e-05 deg
tp 2459442.580796413273
(2021-Aug-16.08079641)
5.1416e-05 TDB
period 1687.564632313751
4.62
8.4512e-06
2.314e-08
d
yr
n .2133251628451224 1.0683e-09 deg/d
Q 3.047999945816979 1.0176e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3456  
   data-arc span      41393 days (113.33 yr)  
   first obs. used      1907-11-07  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39281  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 10:54:23  

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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