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JPL Small-Body Database Browser
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9489 Tanemahuta (1146 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2009489
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09862956546871945 3.0708e-08  
a 2.635111917726265 1.1255e-08 au
q 2.375211974319479 8.0804e-08 au
i 4.742891127919825 4.3373e-06 deg
node 199.575028004651 4.3704e-05 deg
peri 78.57725795528971 5.343e-05 deg
M 2.586880137842818 2.7456e-05 deg
tp 2458589.272816261121
(2019-Apr-15.77281626)
0.00011918 TDB
period 1562.417248047187
4.28
1.001e-05
2.741e-08
d
yr
n .2304122029182358 1.4761e-09 deg/d
Q 2.89501186113305 1.2365e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1266  
   data-arc span      17754 days (48.61 yr)  
   first obs. used      1971-03-24  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5409  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:17:26  

Additional Information
 Earth MOID = 1.36405 au 
 Jupiter MOID = 2.2028 au 
 T_jup = 3.386 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO435790  
diameter diameter 3.433 km 0.883 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.237   0.088 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9489 Tanemahuta           Discovered 1971 Mar. 25 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Named for the god of the forests of the Maori people in New Zealand and for the great kauri tree in the Waipoua forest that also bears this name.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

[ show close-approach data ]
Alternate Designations
 1146 T-1 = 1994 TY8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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