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243 Ida (A884 SB)
Classification: Main-belt Asteroid          SPK-ID: 2000243
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 149 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04326773523473785 2.7846e-08  
a 2.860838470106934 5.8121e-09 au
q 2.737056468632995 8.1785e-08 au
i 1.130237371083703 2.8156e-06 deg
node 323.6310859275075 0.00014255 deg
peri 114.0946557247195 0.00014764 deg
M 320.8397572326118 4.1091e-05 deg
tp 2459192.756621985839
(2020-Dec-09.25662199)
0.00020186 TDB
period 1767.414577228842
4.84
5.3861e-06
1.475e-08
d
yr
n .2036873547599963 6.2072e-10 deg/d
Q 2.984620471580873 6.0636e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3941  
   data-arc span      49323 days (135.04 yr)  
   first obs. used      1885-01-18  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4476  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:22:01  

Additional Information
 Earth MOID = 1.75261 au 
 Jupiter MOID = 2.12049 au 
 T_jup = 3.300 
[ hide covariance matrix ]
Orbital Elements at Epoch 2453542.5 (2005-Jun-21.0) TDB
Reference: JPL 149 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0461834254110659 2.8095e-08  
q 2.729407717715867 8.3008e-08 au
tp 2453862.217782654330
(2006-May-06.71778265)
0.00018325 TDB
node 324.2134757219263 0.00014152 deg
peri 108.5909621821131 0.00014588 deg
i 1.137545289147971 2.8179e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3941  
   data-arc span      49323 days (135.04 yr)  
   first obs. used      1885-01-18  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4476  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:22:01  

Additional Information
 Jupiter MOID = 2.12049 au 
 T_jup = 3.300 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.893146591836301E-16 -2.327304399392518E-15 -7.943752003904094E-13 1.360519985959913E-14 -1.887198297853351E-13 3.029835777989732E-16
q -2.327304399392518E-15 6.890249436293743E-15 2.480625453690835E-12 -5.198071073599637E-14 5.958999240530852E-13 -1.219866421363066E-15
tp -7.943752003904094E-13 2.480625453690835E-12 3.358063336123531E-8 4.474893376036912E-10 6.489000011718068E-9 1.021188548018176E-11
node 1.360519985959913E-14 -5.198071073599637E-14 4.474893376036912E-10 2.002929362426334E-8 -1.993686746883134E-8 -5.36622066732629E-12
peri -1.887198297853351E-13 5.958999240530852E-13 6.489000011718068E-9 -1.993686746883134E-8 2.128240075724102E-8 7.37095084309543E-12
i 3.029835777989732E-16 -1.219866421363066E-15 1.021188548018176E-11 -5.36622066732629E-12 7.37095084309543E-12 7.940403886146467E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.9   n/a MPO502155 IRAS observations used: 13
diameter diameter 32 km n/a Belton et al. (1995) Yeomans E-mail 2001-Apr-04
extent extent 59.8x25.4x18.6 km n/a Thomas et al. (1996) Icarus v.120, pp.20-32 fit ellipsoid
GM GM 0.00275 km^3/s^2 0.00035 Belton et al. (1996) Icarus v.120, pp.185-199 0.0024 < GM < 0.0031
bulk density density 2.6 g/cm^3 0.5 Belton et al. (1996) Icarus v.120, pp.185-199  
rotation period rot_per 4.634 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Gonano-Beurer, M.; Di Martino, M.; Mottola, S.; Neukum, G. (1992) Astron. Astrophys. 254, 393-396.]
[Binzel, R.P.; Slivan, S.M.; Magnusson, P.; Wisniewski, W.Z.; et al. (1993) Icarus 105, 310-325.]
[Davies, M.E.; Colvin, T.R.; Belton, M.J.S.; Veverka, J.; Thomas, P.C. (1996) Icarus 120, 33-37.]
[Cieza, L.A.; Ciliberti, L.N.; Iserte, J.A. (1999) IAPPP Comm. #74, 12-23.]
[Kaasalainen, M.; Torppa, J.; Muinonen, K. (2001) Icarus 153, 37-51.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Proyecto ECLA (Silvia Alonso Perez) (2011) http://www.geocities.com/proyectoecla/]
[Hanus, J.; Broz, M.; Durech, J.; Warner, B.D.; et al. (2013) Astron. Astrophys. 559, A134.]
geometric albedo albedo 0.262   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.802   0.009 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=.81, mean=6.76, max.=14.56) deg.
U-B UB 0.416   0.037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=.81, mean=5.40, max.=14.56) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   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)

243 Ida (A884 SB)          Discovered 1884-Sep-29 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A884 SB = 1988 DB1 = A910 CD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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