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8431 Haseda (1997 YQ13)
Classification: Main-belt Asteroid          SPK-ID: 2008431
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04699234008965045 4.9326e-08  
a 2.807187450395879 2.0467e-08 AU
q 2.675271143031477 1.3783e-07 AU
i 1.600034426398303 4.8446e-06 deg
node 246.2498389074915 0.00020389 deg
peri 218.4124588760953 0.00021445 deg
M 233.7669890260192 6.5443e-05 deg
tp 2457602.887550821280
(2016-Aug-02.38755082)
0.00031519 JED
period 1717.930330762372
4.70
1.8788e-05
5.144e-08
d
yr
n .2095544816652963 2.2918e-09 deg/d
Q 2.939103757760281 2.1429e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1345  
   data-arc span      14505 days (39.71 yr)  
   first obs. used      1975-03-15  
   last obs. used      2014-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51545  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:13:44  

Additional Information
 Earth MOID = 1.69223 AU 
 T_jup = 3.320 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.7 mag n/a MPO266003  

8431 Haseda           Discovered 1997 Dec. 31 by T. Kobayashi at Oizumi.
Haseda Kastumi (b. 1945) is an amateur astronomer in Aichi prefecture. During 2000-2002 he discovered the four novae V463 Sct, V1178 Sco, V2540 Oph and V4743 Sgr. He has also discovered 65 new variables, including some Wolf-Rayet stars.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050919/MPCPages.arcLast Updated: 2005-09-26

Alternate Designations
 1997 YQ13 = 1975 EG5 = 1981 NH1 = 1982 VG6 = 1989 ER = 1991 ST1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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