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
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
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 ]  
190 Ismene
Classification: Outer Main-belt Asteroid          SPK-ID: 2000190
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 99 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1664225780128626 4.08e-08  
a 3.985505452556881 3.1188e-08 au
q 3.322227360458044 1.6816e-07 au
i 6.177402734052965 4.9629e-06 deg
node 175.4559970308651 4.3105e-05 deg
peri 271.2188038095361 4.58e-05 deg
M 259.1652683004024 1.8509e-05 deg
tp 2459414.512707343266
(2021-Jul-19.01270734)
0.00015505 TDB
period 2906.186883271542
7.96
3.4113e-05
9.34e-08
d
yr
n .1238736579785062 1.454e-09 deg/d
Q 4.648783544655717 3.6378e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2500  
   data-arc span      45570 days (124.76 yr)  
   first obs. used      1894-11-06  
   last obs. used      2019-08-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49616  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:05:58  

Additional Information
 Earth MOID = 2.34662 au 
 Jupiter MOID = .770364 au 
 T_jup = 3.022 
[ 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 7.59   n/a PDS3 (MPC 17258)  
diameter diameter 159 km n/a J.G. Williams (E-mail September 1990) based on IRTF albedo of 0.066
rotation period rot_per 6.52 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Binzel, R.P.; Sauter, L.M. (1992) Icarus 95, 222-238.]
[Dahlgren, M.; Lahulla, J.F.; Lagerkvist, C.-I.; Lagerros, J.; et al. (1998) Icarus 133, 247-285.]
[Shevchenko, V.G.; Chiorny, V.G.; Gaftonyuk, N.M.; Krugly, Yu.N.; et al. (2005) Abstr. IAU Symp. 229, p. 133.]
[Shevchenko, V.G.; Chiorny, V.G.; Gaftonyuk, M.; Krugly, Y.N.; et al. (2008) Icarus 196, 601-611.]
[Dunckel, P.B. (2011) Posting on CALL site. http://www.minorplanet.info/call.html]
geometric albedo albedo 0.066   n/a J.G. Williams (E-mail September 1990) IRTF
B-V BV 0.683   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=.86, mean=9.06, max.=15.82) deg.
U-B UB 0.269   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=.86, mean=9.06, max.=15.82) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

190 Ismene          Discovered 1878-Sep-22 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1947 QJ = 1951 DB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Oct-17 17:17 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin