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

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1020299945699572 4.1742e-08  
a 3.023690231980784 1.3934e-08 au
q 2.715183134030552 1.258e-07 au
i 9.394902511368786 4.541e-06 deg
node 309.0791020650814 2.5486e-05 deg
peri 38.12670676526336 3.2442e-05 deg
M 111.9168852847838 1.9912e-05 deg
tp 2458003.468168803258
(2017-Sep-06.96816880)
0.00010577 TDB
period 1920.456048110277
5.26
1.3275e-05
3.634e-08
d
yr
n .1874554746276224 1.2957e-09 deg/d
Q 3.332197329931016 1.5355e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2296  
   data-arc span      36214 days (99.15 yr)  
   first obs. used      1920-03-10  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4657  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:25:11  

Additional Information
 Earth MOID = 1.71345 au 
 Jupiter MOID = 2.05107 au 
 T_jup = 3.217 
[ 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 10.5   n/a MPO389593  
diameter diameter 32.33 km 2.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
rotation period rot_per 7.24 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Albers, K.; Kragh, K.; Monnier, A.; Pligge, Z.; et al. (2010) Minor Planet Bull. 37, 152-158.]
[Strabla, L.; Quadri, U.; Girelli, R. (2013) Minor Planet Bull. 40, 83-84.]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.1038   0.016 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
B-V BV 0.751   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=2.80, mean=11.61, max.=15.95) deg.
U-B UB 0.373   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Oct-17 09:35 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin