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6381 Toyama (1988 DO1)
Classification: Main-belt Asteroid          SPK-ID: 2006381
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1121808131286298 2.9105e-08  
a 2.257810853521616 6.9503e-09 au
q 2.004527796082916 6.5225e-08 au
i 6.081886261335385 3.8106e-06 deg
node 120.3251942947402 3.0036e-05 deg
peri 119.0587138705573 3.5235e-05 deg
M 117.958061059566 1.6924e-05 deg
tp 2458594.473026508292
(2019-Apr-20.97302651)
5.8586e-05 TDB
period 1239.166777955113
3.39
5.7219e-06
1.567e-08
d
yr
n .2905177950251991 1.3415e-09 deg/d
Q 2.511093910960316 7.73e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2190  
   data-arc span      24282 days (66.48 yr)  
   first obs. used      1954-02-10  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46941  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:39:13  

Additional Information
 Earth MOID = 1.00009 au 
 Jupiter MOID = 2.50388 au 
 T_jup = 3.606 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.4   n/a MPO384812  
diameter diameter 5.028 km 0.776 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 27. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2012) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.340   0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

6381 Toyama           Discovered 1988 Feb. 21 by T. Fujii and K. Watanabe at Kitami.
Japanese amateur astronomer Miyuki Toyama (b. 1953) has been explaining the night sky in planetaria for many years. He is also famous as an illustrator of space.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090209/MPCPages.arcLast Updated: 2009-02-11

Alternate Designations
 1988 DO1 = 1955 RK = 1988 FM2 = 1991 AD1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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