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JPL Small-Body Database Browser
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6390 Hirabayashi (1990 BG1)
Classification: Main-belt Asteroid          SPK-ID: 2006390
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1766565942095429 3.8658e-08  
a 2.881459622268441 1.4861e-08 au
q 2.372430779046182 1.101e-07 au
i 6.072639543932558 4.1001e-06 deg
node 75.24577340364675 4.5497e-05 deg
peri 78.72002620735998 4.7424e-05 deg
M 335.7428249327733 1.4427e-05 deg
tp 2458720.880171027021
(2019-Aug-25.38017103)
7.2046e-05 TDB
period 1786.558469798038
4.89
1.3821e-05
3.784e-08
d
yr
n .2015047400271743 1.5589e-09 deg/d
Q 3.390488465490699 1.7486e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1833  
   data-arc span      19878 days (54.42 yr)  
   first obs. used      1964-11-30  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49975  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:17:32  

Additional Information
 Earth MOID = 1.39241 au 
 Jupiter MOID = 1.64281 au 
 T_jup = 3.262 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8   n/a MPO431572  
diameter diameter 14.707 km 0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.074   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

6390 Hirabayashi (1990 BG1)          Discovered 1990-Jan-26 by Endate, K., Watanabe, K. at Kitami
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1990 BG1 = 1964 WJ1 = 1976 JK2 = 1987 MH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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