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4632 Udagawa (1987 YB)
Classification: Main-belt Asteroid          SPK-ID: 2004632
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 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1721976257297269 1.0318e-08  
a 2.206080774701146 5.0495e-09 au
q 1.826198903129612 2.3541e-08 au
i 6.489289816250357 4.7579e-07 deg
node 85.29233243289045 6.8883e-06 deg
peri 316.0135337480372 8.7594e-06 deg
M 44.79084875132916 6.6428e-06 deg
tp 2459051.592239186173
(2020-Jul-21.09223919)
2.1967e-05 TDB
period 1196.824694941443
3.28
4.1091e-06
1.125e-08
d
yr
n .3007959323713769 1.0327e-09 deg/d
Q 2.58596264627268 5.919e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2294  
   data-arc span      15874 days (43.46 yr)  
   first obs. used      1977-10-04  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43936  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:45:34  

Additional Information
 Earth MOID = .840633 au 
 Jupiter MOID = 2.81186 au 
 T_jup = 3.633 
[ 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 13.62   n/a MPCxxxxx  
rotation period rot_per 3.570 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]

4632 Udagawa           Discovered 1987 Dec. 17 by T. Kojima at Chiyoda.
Tetsuo Udagawa (b. 1947) was engaged in the development of a laser holographic system for precise measurements. More recently he has been involved with space and military optics, as well as image projection optics. He also loves mountaineering and taking photographs of mountains.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100130/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1987 YB = 1951 WG2 = 1977 TG6 = 1977 TH3 = 1985 BD2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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