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17657 Himawari (1996 VO4)
Classification: Inner Main-belt Asteroid          SPK-ID: 2017657
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08689881179116675 1.7641e-08  
a 1.927222656805432 4.9866e-09 au
q 1.759749297872024 3.2216e-08 au
i 23.07284703246525 1.3412e-06 deg
node 52.47033991777832 4.5889e-06 deg
peri 289.2140768479493 1.697e-05 deg
M 65.75500899828546 1.6017e-05 deg
tp 2459022.006417337286
(2020-Jun-21.50641734)
4.3561e-05 TDB
period 977.2288185718674
2.68
3.7928e-06
1.038e-08
d
yr
n .368388644663701 1.4298e-09 deg/d
Q 2.094696015738839 5.4199e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1749  
   data-arc span      15903 days (43.54 yr)  
   first obs. used      1977-08-19  
   last obs. used      2021-03-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42901  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:09:23  

Additional Information
 Earth MOID = .837736 au 
 Jupiter MOID = 3.14463 au 
 T_jup = 3.816 
[ 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 15.13   n/a E2021B10  
diameter diameter 9.04 km 1.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
rotation period rot_per 5.507 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2013) Minor Planet Bull. 40, 71-80.]
geometric albedo albedo 0.0313   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2

17657 Himawari           Discovered 1996 Nov. 6 by N. Sato at Chichibu.
Himawari, which means "sunflower", is the name of a series of Japanese weather satellites. Himawari-1 was launched in 1977, and the latest, Himawari-7, was launched in 2006.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110517/MPCPages.arcLast Updated: 2011-06-24

Alternate Designations
 1996 VO4 = 1998 KJ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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