Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
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 ]  
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03868347686344377 1.7353e-08  
a 2.142162574455909 5.2452e-09 au
q 2.059296278069209 3.8997e-08 au
i 3.288584669284658 1.0074e-06 deg
node 120.32193824 1.472e-05 deg
peri 312.8369135016297 2.7446e-05 deg
M 74.26945370620163 2.7424e-05 deg
tp 2458964.242939153073
(2020-Apr-24.74293915)
8.7026e-05 TDB
period 1145.188737234397
3.14
4.2061e-06
1.152e-08
d
yr
n .314358662720864 1.1546e-09 deg/d
Q 2.22502887084261 5.4481e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2041  
   data-arc span      25169 days (68.91 yr)  
   first obs. used      1952-04-19  
   last obs. used      2021-03-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50651  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:10:18  

Additional Information
 Earth MOID = 1.07521 au 
 Jupiter MOID = 2.84269 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 14.48   n/a E2021B10  
rotation period rot_per 7.824 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.]

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-16 09:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin