9905 Tiziano

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9905 Tiziano
Discovery [1]
Discovered by C. J. van Houten
I. van Houten-G.
T. Gehrels
(Palomar–Leiden survey)
Discovery site Palomar Obs.
Discovery date 24 September 1960
MPC designation (9905) Tiziano
Pronunciation titˈtsjaːno
Named after
Tiziano Vecellio or Titian
(Renaissance painter)[2]
4611 P-L · 1990 TD10
main-belt[1][3] · (inner)
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 56.12 yr (20,498 days)
Aphelion 2.7163 AU
Perihelion 2.0915 AU
2.4039 AU
Eccentricity 0.1300
3.73 yr (1,361 days)
0° 15m 51.84s / day
Inclination 12.723°
Physical characteristics
Dimensions 5.239±0.040 km[4]

9905 Tiziano, provisional designation 4611 P-L, is an asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 24 September 1960, by Dutch astronomer couple Ingrid and Cornelis van Houten, as well as Dutch–American astronomer Tom Gehrels. The asteroid was spotted during the Palomar–Leiden survey by examining photographic plates taken at Palomar Observatory, California, United States.[3]

Orbit of Tiziano (blue), with the inner planets and Jupiter (red)

Tiziano orbits the Sun at a distance of 2.1–2.7 AU once every 3 years and 9 months (1,361 days). Its orbit has an eccentricity of 0.13 and an inclination of 13° with respect to the ecliptic.[1] As no precoveries were taken, and no prior identifications were made, the body's observation arc begins with its official discovery observation at Palomar.[3]

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Tiziano measures 5.239 kilometers in diameter and its surface has an albedo of 0.099.[4] It has an absolute magnitude of 14.4[1] As of 2017, the asteroid's rotation period and shape remain unknown.[5]

The survey designation "P-L" stands for Palomar–Leiden, named after Palomar Observatory and Leiden Observatory, which collaborated on the fruitful Palomar–Leiden survey in the 1960s. Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Ingrid and Cornelis van Houten at Leiden Observatory where astrometry was carried out. The trio are credited with the discovery of several thousand minor planets.[6]

This minor planet was named after Tiziano Vecellio (c. 1488–1576) known in English as Titian, who was an Italian Renaissance painter and the most important member of the Venetian school. His application and use of color, would exercise a profound influence not only on painters of the Italian Renaissance, but on future generations of Western art. Titian is famous for the Equestrian Portrait of Charles V and for the Portrait of Pope Paul III.[2] Naming citation was published on 2 April 1999 (M.P.C. 34356).[7]


  1. ^ a b c d e f "JPL Small-Body Database Browser: 9905 Tiziano (4611 P-L)" (2016-11-07 last obs.). Jet Propulsion Laboratory. Retrieved 17 March 2017. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (9905) Tiziano. Springer Berlin Heidelberg. p. 713. ISBN 978-3-540-00238-3. Retrieved 17 March 2017. 
  3. ^ a b c "9905 Tiziano (4611 P-L)". Minor Planet Center. Retrieved 17 March 2017. 
  4. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. Bibcode:2011ApJ...741...68M. arXiv:1109.4096Freely accessible. doi:10.1088/0004-637X/741/2/68. Retrieved 17 March 2017. 
  5. ^ "LCDB Data for (9905) Tiziano". Asteroid Lightcurve Database (LCDB). Retrieved 17 March 2017. 
  6. ^ "Minor Planet Discoverers". Minor Planet Center. 13 March 2017. Retrieved 17 March 2017. 
  7. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 March 2017. 

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