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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04681988424777691 4.4038e-08  
a 2.805968334964383 1.5868e-08 au
q 2.674593222318423 1.2799e-07 au
i 1.600533220841361 4.5422e-06 deg
node 246.235060936725 0.00015703 deg
peri 218.9451582038143 0.00016608 deg
M 359.0233153039811 5.4074e-05 deg
tp 2457605.157731584390
(2016-Aug-04.65773158)
0.00025788 JED
period 1716.811348857368
4.70
1.4563e-05
3.987e-08
d
yr
n .2096910649149656 1.7788e-09 deg/d
Q 2.937343447610343 1.6611e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1747  
   data-arc span      14988 days (41.03 yr)  
   first obs. used      1975-03-15  
   last obs. used      2016-03-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51304  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:02:24  

Additional Information
 Earth MOID = 1.69011 au 
 Jupiter MOID = 2.12574 au 
 T_jup = 3.321 
[ 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 12.8 mag n/a MPO347593  

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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