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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2883570501594072 5.0355e-08  
a 2.335855681526931 1.3004e-08 AU
q 1.662295227603733 1.192e-07 AU
i 7.708276390531283 5.532e-06 deg
node 154.1952604357818 3.2873e-05 deg
peri 195.9266543006457 3.3887e-05 deg
M 27.55853207475998 6.9828e-06 deg
tp 2456900.679206655426
(2014-Aug-31.17920666)
2.5405e-05 JED
period 1303.96951138624
3.57
1.0889e-05
2.981e-08
d
yr
n .2760800746156148 2.3054e-09 deg/d
Q 3.009416135450129 1.6754e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1009  
   data-arc span      15774 days (43.19 yr)  
   first obs. used      1971-07-26  
   last obs. used      2014-10-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51539  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:12:36  

Additional Information
 Earth MOID = .657731 AU 
 T_jup = 3.499 
[ 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 14.2 mag n/a MPO266002  
rotation period rot_per 6.0677 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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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