1336 Zeelandia

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1336 Zeelandia
Discovery [1]
Discovered by H. van Gent
Discovery site Johannesburg Obs.
Discovery date 9 September 1934
MPC designation (1336) Zeelandia
Named after
(a province of the Netherlands)
1934 RW · 1929 QE
1930 XC · 1935 YF
1939 RP · A906 YO
main-belt · (outer)
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 112.01 yr (40,913 days)
Aphelion 3.0348 AU
Perihelion 2.6654 AU
2.8501 AU
Eccentricity 0.0648
4.81 yr (1,757 days)
0° 12m 17.28s / day
Inclination 3.1972°
Physical characteristics
Dimensions 19.18±0.51 km[5]
20.99±2.1 km[3][6]
21.441±0.132 km[7]
23.056±0.108 km[8]
23.63±3.31 km[9]
15.602 h[10]
15.624±0.001 h[11]
B–V = 0.810[1]
U–B = 0.366[1]
Tholen = S[1]
SMASS = S[1][3]
10.66[1][3][5][6][8] · 10.71±0.58[12] · 10.79[9] · 10.94±0.02[10]

1336 Zeelandia, provisional designation 1934 RW, is a stony Koronian asteroid from the outer regions of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 9 September 1934, by Dutch astronomer Hendrik van Gent at the Union Observatory in Johannesburg, South Africa.[13] The asteroid was named for the Dutch province of Zeeland.[2]

Orbit and classification[edit]

Zeelandia belongs to the Koronis family (605),[3][4] a very large asteroid family of 6,000 known members with stony composition and nearly co-planar ecliptical orbits.[14]

It orbits the Sun in the outer main-belt at a distance of 2.7–3.0 AU once every 4 years and 10 months (1,757 days; semi-major axis of 2.85 AU). Its orbit has an eccentricity of 0.06 and an inclination of 3° with respect to the ecliptic.[1] In October 1905, a first precovery was taken at the Lowell Observatory in Arizona. Its first identification as A906 YO was made at Taunton Observatory (803) in December 1906. The body's observation arc begins with its official discovery observation at Johannesburg in September 1934.[13]

Physical characteristics[edit]

Zeelandia has been characterized as a stony S-type asteroid in both the Tholen and SMASS classification.[1]

Rotation period[edit]

In March 2004, a rotational lightcurve of Zeelandia was obtained from photometric observations by a collaboration of American astronomers. Lightcurve analysis gave a well-defined rotation period of 15.602 hours with a brightness variation of 0.61 magnitude (U=3).[10] The result was confirmed by photometrists Pierre Antonini, Federico Manzini, Julian Oey and Frederick Pilcher, as well as Hiromi and Hiroko Hamanowa, who measured a similar period of 15.624 with an amplitude of 0.50 magnitude in April 2005 (U=3).[11]

Diameter and albedo[edit]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Zeelandia measures between 19.18 and 23.63 kilometers in diameter and its surface has an albedo between 0.153 and 0.273.[5][6][7][8][9]

The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.2183 and a diameter of 20.99 kilometers based on an absolute magnitude of 10.66.[3][6]


This minor planet was named for the Dutch province of Zeeland. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 121).[2]


  1. ^ a b c d e f g h i "JPL Small-Body Database Browser: 1336 Zeelandia (1934 RW)" (2017-10-31 last obs.). Jet Propulsion Laboratory. Retrieved 28 November 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1336) Zeelandia. Springer Berlin Heidelberg. p. 109. ISBN 978-3-540-00238-3. Retrieved 28 November 2017. 
  3. ^ a b c d e f g "LCDB Data for (1336) Zeelandia". Asteroid Lightcurve Database (LCDB). Retrieved 28 November 2017. 
  4. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 28 November 2017. 
  5. ^ 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". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 28 November 2017. 
  6. ^ a b c d e 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. Archived from the original on 2016-06-03. Retrieved 12 November 2017. 
  7. ^ a b c Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos" (PDF). The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645Freely accessible. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 28 November 2017. 
  8. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 28 November 2017. 
  9. ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 28 November 2017. 
  10. ^ a b c Slivan, Stephen M.; Binzel, Richard P.; Boroumand, Shaida C.; Pan, Margaret W.; Simpson, Christine M.; Tanabe, James T.; et al. (May 2008). "Rotation rates in the Koronis family, complete to H≈11.2". Icarus. 195 (1): 226–276. Bibcode:2008Icar..195..226S. doi:10.1016/j.icarus.2007.11.019. Retrieved 28 November 2017. 
  11. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1336) Zeelandia". Geneva Observatory. Retrieved 28 November 2017. 
  12. ^ 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 28 November 2017. 
  13. ^ a b "1336 Zeelandia (1934 RW)". Minor Planet Center. Retrieved 28 November 2017. 
  14. ^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families" (PDF). Asteroids IV: 297–321. arXiv:1502.01628Freely accessible. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. Retrieved 28 November 2017. 

External links[edit]