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7257 Yoshiya (1994 AH1)
Classification: Main-belt Asteroid          SPK-ID: 2007257
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1046557299364365 2.8052e-08  
a 2.36119352273544 7.7462e-09 au
q 2.114081091092376 6.6554e-08 au
i 3.715766156176351 3.1652e-06 deg
node 260.9936303123342 6.3011e-05 deg
peri 171.6040857986774 6.7727e-05 deg
M 28.34932315201166 2.2742e-05 deg
tp 2458496.139537448331
(2019-Jan-12.63953745)
8.3812e-05 TDB
period 1325.243862689357
3.63
6.5214e-06
1.785e-08
d
yr
n .2716481171015886 1.3368e-09 deg/d
Q 2.608305954378503 8.5569e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2016  
   data-arc span      15035 days (41.16 yr)  
   first obs. used      1978-10-08  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44778  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 22:23:14  

Additional Information
 Earth MOID = 1.12871 au 
 Jupiter MOID = 2.61093 au 
 T_jup = 3.541 
[ 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 13.5   n/a MPO416792  
diameter diameter 5.151 km 0.128 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.319   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7257 Yoshiya           Discovered 1994 Jan. 7 by T. Kobayashi at Oizumi.
Yoshiya Watanabe (b. 1968) is a science educator and planetarian of the Osaka Science Museum. Although his main work is teaching astronomy, he also operates several nation wide networks for astronomical education and has organized monthly star-gazing campaigns since 1996.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020921/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1994 AH1 = 1978 TL5 = 1989 UJ9 = 1992 PA1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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