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1604 Tombaugh (1931 FH)
Classification: Main-belt Asteroid          SPK-ID: 2001604
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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 2-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.
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 2454800.5 (2008-Nov-30.0) TDB
Reference: MPC38747 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 0.0963992 n/a  
a 3.0266044 n/a AU
q 2.7348422 n/a AU
i 9.37983 n/a deg
node 309.25138 n/a deg
peri 36.31208 n/a deg
M 121.94886 n/a deg
tp 2454149.0108834
(2007-Feb-17.51088341)
n/a JED
period 1923.2330830
5.27
n/a
n/a
d
yr
n 0.18718480 n/a deg/d
Q 3.3183666 n/a AU
  Orbit Determination Parameters
   # obs. used (total)      120  
   first obs. used      1930-??-??  
   last obs. used      1999-06-08  
   # oppositions      26  
   planetary ephem.      DE403  
   quality code      1  
   fit RMS      0.96  
   data source      MPC:mpn  
   producer      Williams  

Additional Information
 T_jup = 3.217 

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.53 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
diameter diameter 32.33 km 2.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
rotation period rot_per 7.04 h n/a IAU Lightcurve Data
(A.W. Harris, E-mail Mar. 2006)
Published Reference List:
[Lagerkvist, C.-I.: 1978, Astron. Astrophys. Suppl. Ser. 31, 361-381.]
[Binzel, R.P.: 1987, Icarus 72, 135-208.]
[Sarneczky, K., Szabo, G., Kiss, L.L.: 1999, Astron. Astrophys. Suppl. Ser. 137, 363-368.]
geometric albedo albedo 0.1038   0.016 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
B-V BV .751 mag .018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=2.80, mean=11.61, max.=15.95) deg.
U-B UB .373 mag .026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=2.80, mean=11.61, max.=15.95) deg.
Tholen spectral type spec_T XSCU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Xc   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)

1604 Tombaugh           \N Observatory. The discovery position was published by C. O. Lampland and K. Newman.
Named by the Lowell Observatory for Clyde W. Tombaugh, the discoverer of Pluto, on the occasion of a symposium on Pluto, held on the fiftieth anniversary of its discovery, 1980 Feb. 18. Tombaugh marked, during the course of his blink examination, over 4000 minor planets on plates obtained with the 0.33-m photographic telescope during the trans-Saturnian search program at the Lowell Observatory.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5280Last Updated: 2007-10-23

Alternate Designations
 1931 FH = 1930 DX = 1933 SA1 = 1936 FA = 1937 JH = 1941 CF = 1943 OE = 1948 ME = 1949 ST1 = A920 EC 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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