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16807 Terasako (1997 TW25)
Classification: Main-belt Asteroid          SPK-ID: 2016807
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1041986520602051 2.9383e-08  
a 2.280088970488766 6.6879e-09 au
q 2.042506773186496 6.6344e-08 au
i 4.313055879453032 3.0481e-06 deg
node 128.4380208974033 4.6547e-05 deg
peri 339.4231597876818 4.9609e-05 deg
M 241.5867333175069 1.8187e-05 deg
tp 2459810.141380589308
(2022-Aug-18.64138059)
6.4344e-05 TDB
period 1257.552478570096
3.44
5.5329e-06
1.515e-08
d
yr
n .2862703593963243 1.2595e-09 deg/d
Q 2.517671167791037 7.3848e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1436  
   data-arc span      11234 days (30.76 yr)  
   first obs. used      1990-09-14  
   last obs. used      2021-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51805  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:13:25  

Additional Information
 Earth MOID = 1.06019 au 
 Jupiter MOID = 2.56816 au 
 T_jup = 3.595 
[ 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 15.29   n/a E2021B10  

16807 Terasako           Discovered 1997 Oct. 12 by A. Nakamura at Kuma Kogen.
Masanori Terasako (b. 1951) is a renowned amateur astronomer in Japan. Terasako started his visual comet searching in 1971, and after sweeping for 1374 hours he discovered C/1987 B2. He is also famous for his telescopic meteor observations.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010804/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1997 TW25 = 1990 RZ12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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