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1089 Tama (1927 WB)
Classification: Main-belt Asteroid          SPK-ID: 2001089
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 80 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .127768878689025 1.7802e-08  
a 2.213570968189099 4.3052e-09 au
q 1.930745487684998 4.0299e-08 au
i 3.726554020179071 5.7481e-07 deg
node 71.47352275270903 5.3369e-06 deg
peri 354.6549320476147 5.8282e-06 deg
M 140.0841072861934 8.1509e-06 deg
tp 2458928.414736894839
(2020-Mar-19.91473689)
2.6608e-05 TDB
period 1202.925142490208
3.29
3.5094e-06
9.608e-09
d
yr
n .2992704926382653 8.7308e-10 deg/d
Q 2.496396448693199 4.8553e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3566  
   data-arc span      46258 days (126.65 yr)  
   first obs. used      1894-11-01  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3893  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:56:35  

Additional Information
 Earth MOID = .944197 au 
 Jupiter MOID = 2.76305 au 
 T_jup = 3.642 
[ 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 11.68   n/a MPCxxxxx  
diameter diameter 13.082 km 0.373 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 16.44 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R.; et al. (2004) IAUC 8265. (1089)]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R.; et al. (2006) Astron. Astrophys. 446, 1177-1184.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Marchis, F.; Enriquez, J.E.; Emery, J.P.; Mueller, M.; et al. (2012) Icarus 221, 1130-1161.]
[Polishook, D. (2012) Minor Planet Bull. 39, 242-244.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.216   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1089 Tama (1927 WB)          Discovered 1927-Nov-17 by Oikawa, O. at Tokyo
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1927 WB = 1930 ST = 1952 HE4 = A894 VA = A904 VD = A919 HA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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