Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2876688114867008 4.7026e-08  
a 2.338087700882158 1.1953e-08 au
q 1.665492790817715 1.1018e-07 au
i 7.706647577428611 5.0666e-06 deg
node 154.1882230005611 2.8292e-05 deg
peri 196.1753116481377 2.9072e-05 deg
M 192.792294635577 6.0049e-06 deg
tp 2458207.017601877286
(2018-Mar-29.51760188)
2.2884e-05 JED
period 1305.838963580926
3.58
1.0014e-05
2.742e-08
d
yr
n .2756848356039194 2.1141e-09 deg/d
Q 3.010682610946601 1.5392e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1308  
   data-arc span      16299 days (44.62 yr)  
   first obs. used      1971-07-26  
   last obs. used      2016-03-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51704  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 15:59:54  

Additional Information
 Earth MOID = .65977 au 
 Jupiter MOID = 2.41383 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. 2016-February); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-May-01 11:44 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin