Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.

JPL Small-Body Database Browser
Search: [ help ]  
9998 ISO (1293 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2009998
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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.

[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09443493349601466 4.2765e-08  
a 2.161404381635633 9.2288e-09 au
q 1.957292302597877 9.1002e-08 au
i 3.911431826868818 5.1673e-06 deg
node 345.0384520169906 6.3351e-05 deg
peri 32.91559310777639 7.0025e-05 deg
M 214.0120121430674 3.1609e-05 deg
tp 2459071.170620394052
0.00010323 TDB
period 1160.653186808153
n .3101701732194573 1.9866e-09 deg/d
Q 2.365516460673388 1.01e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1333  
   data-arc span      23962 days (65.60 yr)  
   first obs. used      1953-10-01  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53302  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:46:20  

Additional Information
 Earth MOID = .958909 au 
 Jupiter MOID = 2.99713 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 15.0   n/a MPO435795  
diameter diameter 2.235 km 0.373 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.388   0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

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 ]
FirstGov 2019-Oct-17 09:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin