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6987 Onioshidashi (1994 WZ)
Classification: Main-belt Asteroid          SPK-ID: 2006987
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04620476601689418 3.6865e-08  
a 2.791584861305495 1.1136e-08 au
q 2.662600335972571 1.0353e-07 au
i 2.967870098476665 3.8073e-06 deg
node 264.3772997783694 6.9324e-05 deg
peri 327.2045538407171 7.8721e-05 deg
M 51.18095571327895 3.6106e-05 deg
tp 2458958.296413863570
(2020-Apr-18.79641386)
0.00017128 TDB
period 1703.627644188218
4.66
1.0194e-05
2.791e-08
d
yr
n .2113137816400841 1.2644e-09 deg/d
Q 2.92056938663842 1.165e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2056  
   data-arc span      10822 days (29.63 yr)  
   first obs. used      1991-01-19  
   last obs. used      2020-09-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47454  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 19:17:47  

Additional Information
 Earth MOID = 1.65059 au 
 Jupiter MOID = 2.06712 au 
 T_jup = 3.325 
[ 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 13.65   n/a E2021B10  
diameter diameter 5.723 km 0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 35.6657 h n/a LCDB (Rev. 2020-October); 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 0.135   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6987 Onioshidashi           Discovered 1994 Nov. 25 by T. Kobayashi at Oizumi.
Onioshidashi is a lava plateau formed by the lava flow of the 1783 eruption of Mt. Asamayama. The gigantic, dark lava spread, 3 km by 12 km and 30 m thick, makes a chilling and unearthly scene.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1994 WZ = 1991 CT = 1993 PO6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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