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31152 Daishinsai (1997 UV21)
Classification: Main-belt Asteroid          SPK-ID: 2031152
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2153001570574541 2.6696e-08  
a 2.537076552208768 9.0652e-09 au
q 1.990843572051436 6.6448e-08 au
i 13.09973014254979 5.9667e-06 deg
node 52.83051850134281 1.6241e-05 deg
peri 68.92829461523331 2.4186e-05 deg
M 253.3703737276033 1.8807e-05 deg
tp 2459833.693977222168
(2022-Sep-11.19397722)
7.7886e-05 TDB
period 1476.042234246527
4.04
7.9111e-06
2.166e-08
d
yr
n .2438954602025792 1.3072e-09 deg/d
Q 3.0833095323661 1.1017e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1815  
   data-arc span      10134 days (27.75 yr)  
   first obs. used      1993-11-07  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48744  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 23:47:14  

Additional Information
 Earth MOID = 1.04878 au 
 Jupiter MOID = 2.1692 au 
 T_jup = 3.379 
[ 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 14.25   n/a E2021B10  
diameter diameter 8.488 km 0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.194 h n/a LCDB (Rev. 2020-October); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.053   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

31152 Daishinsai           Discovered 1997 Oct. 29 by T. Okuni at Nanyo.
The Higashi Nihon Dai Shinsai earthquake of 2011 March 11 caused widespread destruction in eastern Japan and killed about 20000 people.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120406/MPCPages.arcLast Updated: 2012-04-09

Alternate Designations
 1997 UV21 = 1993 VH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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