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JPL Small-Body Database Browser
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1641 Tana (1935 OJ)
Classification: Main-belt Asteroid          SPK-ID: 2001641
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09847558042794399 5.0531e-08  
a 3.018733357100459 1.2979e-08 au
q 2.721461837602795 1.55e-07 au
i 9.32213691076964 5.4742e-06 deg
node 331.4011675853679 2.1697e-05 deg
peri .09067734072661321 2.8658e-05 deg
M 48.08628119706557 1.7757e-05 deg
tp 2458744.609449573160
(2019-Sep-18.10944957)
9.4652e-05 TDB
period 1915.735545781485
5.24
1.2355e-05
3.383e-08
d
yr
n .1879173776321749 1.2119e-09 deg/d
Q 3.316004876598123 1.4257e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2508  
   data-arc span      40304 days (110.35 yr)  
   first obs. used      1909-09-21  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43233  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:00:53  

Additional Information
 Earth MOID = 1.71079 au 
 Jupiter MOID = 2.03058 au 
 T_jup = 3.220 
[ 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 10.5   n/a MPO502169  
diameter diameter 25.66 km 2.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
rotation period rot_per 7.95 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2016) Astron. Astrophys., submitted.]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2018) Icarus 299, 84-96.]
geometric albedo albedo 0.0739   0.015 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
B-V BV 0.860   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=18.59 deg.
U-B UB 0.410   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=18.59 deg.

1641 Tana           Discovered 1935 July 25 by C. Jackson at Johannesburg.
Named for a river in Kenya.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5183Last Updated: 2006-03-21

Alternate Designations
 1935 OJ = 1930 QQ = 1951 RJ1 = A909 SC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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