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7710 Ishibashi (1994 WT2)
Classification: Outer Main-belt Asteroid          SPK-ID: 2007710
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05813119100279376 3.6078e-08  
a 3.416550571947416 1.8594e-08 au
q 3.217942418078837 1.2583e-07 au
i 6.277475329348278 4.266e-06 deg
node 41.45909266913672 3.3138e-05 deg
peri 12.14543015862056 4.8476e-05 deg
M 36.5477473749427 3.4091e-05 deg
tp 2458766.326190646074
0.00021845 TDB
period 2306.642062027917
n .1560710289326385 1.2741e-09 deg/d
Q 3.615158725815995 1.9675e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2970  
   data-arc span      16132 days (44.17 yr)  
   first obs. used      1975-12-02  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41135  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:36:15  

Additional Information
 Earth MOID = 2.22914 au 
 Jupiter MOID = 1.66983 au 
 T_jup = 3.131 
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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 12.4   n/a MPO365341  
diameter diameter 17.498 km 0.368 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 11.521 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.069   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

7710 Ishibashi           Discovered 1994 Nov. 30 by T. Kobayashi at Oizumi.
Tadashi Ishibashi (b. 1926), retired sea captain, became interested in stars in 1936 and has observed meteors since 1940. Since 1947 he has collected and studied ancient documents about the stars. Currently he lectures on star topics aboard large passenger ships.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030806/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1994 WT2 = 1975 XN3 = 1981 UY2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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