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JPL Small-Body Database Browser
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15821 Iijimatatsushi (1994 TM2)
Classification: Main-belt Asteroid          SPK-ID: 2015821
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03859858608349994 4.0984e-08  
a 2.142098296462238 6.4518e-09 au
q 2.059416330966922 9.1459e-08 au
i 3.288543231019744 2.7633e-06 deg
node 120.3223830241208 8.1331e-05 deg
peri 312.9266885271928 9.8713e-05 deg
M 11.31769209139761 5.6419e-05 deg
tp 2458964.499138445322
(2020-Apr-24.99913845)
0.00017941 TDB
period 1145.137193609916
3.14
5.1735e-06
1.416e-08
d
yr
n .3143728122786237 1.4203e-09 deg/d
Q 2.224780261957554 6.7008e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1802  
   data-arc span      24761 days (67.79 yr)  
   first obs. used      1952-04-19  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50993  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:28:38  

Additional Information
 Earth MOID = 1.07587 au 
 Jupiter MOID = 2.8435 au 
 T_jup = 3.709 
[ 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 14.4   n/a MPO337392  
rotation period rot_per 7.824 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

15821 Iijimatatsushi           Discovered 1994 Oct. 2 by K. Endate and K. Watanabe at Kitami.
Tatsushi Iijima (1963-2015) was a journalist who worked at Kyodo News for about 28 years. He was a professional photographer who loved motorbikes. He supported the Japanese space missions Hayabusa and Hayabusa2. He passed away as a result of a scuba-diving accident.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2016-03-23Last Updated: 2016-03-24

Alternate Designations
 1994 TM2 = 1981 NW = 1996 GL4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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