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8355 Masuo (1989 RQ1)
Classification: Mars-crossing Asteroid          SPK-ID: 2008355
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2880161162409597 4.8501e-08  
a 2.337220139177448 1.2409e-08 au
q 1.664063071891404 1.1424e-07 au
i 7.708698605075571 5.1314e-06 deg
node 154.1919685031426 3.0852e-05 deg
peri 196.0520825541847 3.1846e-05 deg
M 137.8358723958104 6.333e-06 deg
tp 2456900.801995395890
(2014-Aug-31.30199540)
2.3456e-05 JED
period 1305.112221736461
3.57
1.0394e-05
2.846e-08
d
yr
n .2758383486142039 2.1968e-09 deg/d
Q 3.010377206463492 1.5984e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1224  
   data-arc span      16216 days (44.40 yr)  
   first obs. used      1971-07-26  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52282  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:07:10  

Additional Information
 Earth MOID = .65726 au 
 Jupiter MOID = 2.41359 au 
 T_jup = 3.498 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3 mag n/a MPO324385  
rotation period rot_per 6.0677 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2007) http://www.asu.cas.cz/~ppravec/neo.htm]

8355 Masuo           Discovered 1989 Sept. 5 by E. F. Helin at Palomar.
Infrared astronomer Masuo Tanaka (b. 1955) is a researcher at the Institute of Astronomy, University of Tokyo. His research interests include excitation of infrared molecular hydrogen emission, ices in molecular clouds, final-stage evolution of massive stars, and mass loss from massive stars.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120703/MPCPages.arcLast Updated: 2012-07-09

Alternate Designations
 1989 RQ1 = 1971 OP = 1996 OA1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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