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9998 ISO (1293 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2009998
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09398125270202357 3.6968e-08  
a 2.161394657769136 5.4211e-09 au
q 1.958264080248531 7.8854e-08 au
i 3.912297249193248 2.8853e-06 deg
node 344.9838955558224 5.2219e-05 deg
peri 33.2558153194303 5.5785e-05 deg
M 100.6007189213839 1.8098e-05 deg
tp 2459072.161785933908
(2020-Aug-10.66178593)
5.8631e-05 TDB
period 1160.645354383985
3.18
4.3666e-06
1.196e-08
d
yr
n .310172266351827 1.1669e-09 deg/d
Q 2.364525235289741 5.9306e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2214  
   data-arc span      24692 days (67.60 yr)  
   first obs. used      1953-10-01  
   last obs. used      2021-05-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4703  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 16:13:58  

Additional Information
 Earth MOID = .96 au 
 Jupiter MOID = 2.99279 au 
 T_jup = 3.688 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.16   n/a E2021B10  
diameter diameter 2.235 km 0.373 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.388   0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9998 ISO           Discovered 1971 Mar. 25 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
ISO, the Infrared Space Observatory, was launched on 1995 Nov. 17 to study the universe over a broad range of wavelengths. Among its many discoveries are water vapor on Saturn's moon Titan, infrared galaxies at immense distances, young stars in the Orion Association and the nature of the surface of major and minor planets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001111/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1293 T-1 = 1991 PW15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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