1604 Tombaugh

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1604 Tombaugh
Discovery [1]
Discovered by C. O. Lampland
Discovery site Lowell Obs.
Discovery date 24 March 1931
Designations
MPC designation 1604 Tombaugh
Named after
Clyde Tombaugh
(astronomer)[2]
1931 FH · 1930 DX
1933 SA1 · 1936 FA
1937 JH · 1941 CF
1943 OE · 1948 ME
1949 ST1 · A920 EC
main-belt · Eos[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 96.43 yr (35,221 days)
Aphelion 3.3296 AU
Perihelion 2.7161 AU
3.0229 AU
Eccentricity 0.1015
5.26 yr (1,920 days)
321.85°
0° 11m 15s / day
Inclination 9.3951°
309.10°
38.244°
Physical characteristics
Dimensions 28.78±0.53 km[4]
32.25 km (derived)[3]
32.33±2.2 km (IRAS:3)[5]
6.15 h (dated)[6]
7.04 h (dated)[7]
7.047±0.004 h[8]
7.056±0.001 h[9]
8.2 h (dated)[10]
0.0933 (derived)[3]
0.1038±0.016 (IRAS:3)[5]
0.138±0.006[4]
B–V = 0.751[1]
U–B = 0.373[1]
XSCU (Tholen)[1] · Xc (SMASS)[1] · X[3]
10.4[1] · 10.53[5][4] · 10.65[3][7] · 10.93±0.15[11]

1604 Tombaugh, provisional designation 1931 FH, is a rare-type Eoan asteroid from the outer region of the asteroid belt, approximately 32 kilometers in diameter. It was discovered on 24 March 1931, by American astronomer Carl Otto Lampland at Lowell Observatory in Flagstaff, Arizona, in the United States.[12]

Tombaugh is a member of the Eos family. It is classified as a X-type asteroid, as well as a rare XSCU and intermediate Xc type in the Tholen and SMASS taxonomy, respectively. It orbits the Sun at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,920 days). Its orbit has an eccentricity of 0.10 and an inclination of 9° with respect to the ecliptic.[1] Previously identified as A920 EC and 1930 DX at Heidelberg in 1920 and 1930, Tombaugh's observation arc begins one year prior to its official 1931-discovery at Flagstaff.[12]

In April 2010 and November 2012, two rotational light-curves of Tombaugh were obtained from photometric observations at Oakley Southern Sky Observatory, Australia, and at Bassano Bresciano Observatory, Italy, respectively. The light-curve analysis gave a rotation period of 7.047 and 7.056 hours with a brightness variation of 0.16 and 0.35 magnitude, respectively (U=2+/2+),[8][9] These periods supersede previous results obtained by astronomers Claes-Ingvar Lagerkvist (1975), Richard P. Binzel (1984) and Krisztián Sárneczky (U=1/2/2).[6][7][10]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS and the Japanese Akari satellite, Tombaugh measures 28.78 and 32.33 kilometers in diameter, and its surface has an albedo of 0.138 and 0.104, respectively.[4][5] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0933 and a diameter of 32.25 kilometers using an absolute magnitude of 10.65.[3]

This minor planet was named for American astronomer Clyde Tombaugh (1906–1997), famous for his discovery of Pluto in 1930. The Lowell Observatory named the body on the occasion of a symposium on Pluto, held in 1980. When Tombaugh examined the photographic plates during the trans-Saturnian search program at the Lowell Observatory, he also marked over 4,000 minor planets on these plates.[2] Naming citation was published on 1 April 1980 (M.P.C. 5280).[13]

References[edit]

  1. ^ a b c d e f g h "JPL Small-Body Database Browser: 1604 Tombaugh (1931 FH)" (2016-08-14 last obs.). Jet Propulsion Laboratory. Retrieved 29 December 2016. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1604) Tombaugh. Springer Berlin Heidelberg. p. 127. ISBN 978-3-540-00238-3. Retrieved 29 December 2016. 
  3. ^ a b c d e f "LCDB Data for (1604) Tombaugh". Asteroid Lightcurve Database (LCDB). Retrieved 29 December 2016. 
  4. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey" (PDF). Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 29 December 2016. 
  5. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 29 December 2016. 
  6. ^ a b Sárneczky, K.; Szabó, Gy.; Kiss, L. L. (June 1999). "CCD observations of 11 faint asteroids". Astronomy and Astrophysics Supplement: 363–368. Bibcode:1999A&AS..137..363S. doi:10.1051/aas:1999251. Retrieved 29 December 2016. 
  7. ^ a b c Binzel, R. P. (October 1987). "A photoelectric survey of 130 asteroids". Icarus: 135–208. Bibcode:1987Icar...72..135B. doi:10.1016/0019-1035(87)90125-4. ISSN 0019-1035. Retrieved 29 December 2016. 
  8. ^ a b Albers, Kenda; Kragh, Katherine; Monnier, Adam; Pligge, Zachary; Stolze, Kellen; West, Josh; et al. (October 2010). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2009 October thru 2010 April". The Minor Planet Bulletin. 37 (4): 152–158. Bibcode:2010MPBu...37..152A. ISSN 1052-8091. Retrieved 29 December 2016. 
  9. ^ a b Strabla, Luca; Quadri, Ulisse; Girelli, Robert (April 2013). "Asteroid Observed from Bassano Bresciano Observatory 2012 August-September". The Minor Planet Bulletin. 40 (2): 83–84. Bibcode:2013MPBu...40...83S. ISSN 1052-8091. Retrieved 29 December 2016. 
  10. ^ a b Lagerkvist, C.-I. (March 1978). "Photographic photometry of 110 main-belt asteroids". Astronomy and Astrophysics Supplement Series: 361–381. Bibcode:1978A&AS...31..361L. Retrieved 29 December 2016. 
  11. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 29 December 2016. 
  12. ^ a b "1604 Tombaugh (1931 FH)". Minor Planet Center. Retrieved 29 December 2016. 
  13. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 29 December 2016. 

External links[edit]