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16790 Yuuzou (1997 AZ4)
Classification: Main-belt Asteroid          SPK-ID: 2016790
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06545419065818239 2.625e-08  
a 2.712441336535558 1.0908e-08 au
q 2.534900684144825 7.3896e-08 au
i 3.005795623207102 1.4695e-06 deg
node 291.6409227763643 1.9177e-05 deg
peri 285.3304800450571 2.227e-05 deg
M 350.8438041799805 1.1159e-05 deg
tp 2459242.000328042600
(2021-Jan-27.50032804)
5.0581e-05 TDB
period 1631.694907908184
4.47
9.8428e-06
2.695e-08
d
yr
n .2206294805819529 1.3309e-09 deg/d
Q 2.889981988926292 1.1622e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2384  
   data-arc span      15475 days (42.37 yr)  
   first obs. used      1978-11-01  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47204  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:41:42  

Additional Information
 Earth MOID = 1.52827 au 
 Jupiter MOID = 2.09207 au 
 T_jup = 3.357 
[ 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 13.7   n/a MPO492936  
diameter diameter 6.677 km 0.335 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.576 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.]
geometric albedo albedo 0.173   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16790 Yuuzou           Discovered 1997 Jan. 2 by N. Sato at Chichibu.
Yuuzou Hasegawa (1956-2007) was a Japanese aerospace engineer who contributed to the success of the mission `KAGUYA' as a leader of design, development and operations of Ground Test Facilities/Equipment, thereby realizing some unusual verifications and tests that assured 15 special KAGUYA flights.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20101128/MPCPages.arcLast Updated: 2010-12-06

Alternate Designations
 1997 AZ4 = 1978 VR1 = 1983 YP = 1998 FC129 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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