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28004 Terakawa (1997 XA)
Classification: Main-belt Asteroid          SPK-ID: 2028004
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1954818073498066 4.1163e-08  
a 2.78323339768035 1.6317e-08 au
q 2.239161902825452 1.119e-07 au
i 8.994883902116188 4.4295e-06 deg
node 246.1368066820573 3.2295e-05 deg
peri 202.5760879800634 3.474e-05 deg
M 200.1055091940185 1.3173e-05 deg
tp 2459353.775542852527
(2021-May-19.27554285)
6.4697e-05 TDB
period 1695.988361199779
4.64
1.4914e-05
4.083e-08
d
yr
n .2122656076161561 1.8666e-09 deg/d
Q 3.327304892535248 1.9506e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1002  
   data-arc span      8473 days (23.20 yr)  
   first obs. used      1996-06-20  
   last obs. used      2019-09-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51643  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:45:23  

Additional Information
 Earth MOID = 1.25829 au 
 Jupiter MOID = 1.92959 au 
 T_jup = 3.286 
[ 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 14.5   n/a MPO449168  
diameter diameter 5.988 km 0.457 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.094   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

28004 Terakawa           Discovered 1997 Dec. 2 by M. Akiyama at Mishima.
Expert mirror polisher Syoji Terakawa (b. 1951) has had an interest in telescope making and astronomy since he was 14 years old.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1997 XA = 1999 DT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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