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7590 Aterui (1992 UP4)
Classification: Main-belt Asteroid          SPK-ID: 2007590
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09619744858136028 2.6908e-08  
a 2.22474057951895 6.0625e-09 au
q 2.01072621201381 5.972e-08 au
i 6.384474768238916 3.0601e-06 deg
node 127.1092105690577 2.9108e-05 deg
peri 352.425547221926 3.4581e-05 deg
M 43.25157261010891 1.7785e-05 deg
tp 2458854.881385817129
(2020-Jan-06.38138582)
5.9921e-05 TDB
period 1212.041503748265
3.32
4.9543e-06
1.356e-08
d
yr
n .2970195318284829 1.2141e-09 deg/d
Q 2.43875494702409 6.6457e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2305  
   data-arc span      10091 days (27.63 yr)  
   first obs. used      1992-10-26  
   last obs. used      2020-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43605  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:41:59  

Additional Information
 Earth MOID = 1.02683 au 
 Jupiter MOID = 2.61225 au 
 T_jup = 3.632 
[ 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 14.1   n/a MPO502225  
diameter diameter 4.211 km 0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.58993 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.398   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7590 Aterui           Discovered 1992 Oct. 26 by K. Endate and K. Watanabe at Kitami.
Aterui, patriarch of the Ainu tribe in northern Japan in the late eighth century, was believed to have had a castle in the present Mizusawa City. He resisted military invasion by the central government. He was eventually compelled to surrender to the commander of the Kyoto troops and was executed near Kyoto in 801.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000124/MPCPages.arcLast Updated: 2013-03-29

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