2175 Andrea Doria

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2175 Andrea Doria
Discovery [1]
Discovered by P. Wild
Discovery site Zimmerwald Obs.
Discovery date 12 October 1977
MPC designation (2175) Andrea Doria
Named after
Andrea Doria
(16th-century admiral)[2]
1977 TY · 1964 VY1
1967 RS · 1967 TE
main-belt · Flora[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 66.18 yr (24,171 days)
Aphelion 2.6751 AU
Perihelion 1.7560 AU
2.2155 AU
Eccentricity 0.2074
3.30 yr (1,205 days)
0° 17m 56.04s / day
Inclination 3.7056°
Physical characteristics
Dimensions 3.86±0.14 km[4]
4.013±0.021 km[6]
4.50 km (calculated)[3]
4.880±0.001 h[a]
0.24 (assumed)[3]
13.6[6] · 13.70[4] · 13.9[1][3] · 14.28±0.29[7]

2175 Andrea Doria, provisional designation 1977 TY, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter.

It was discovered on 12 October 1977, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, and named after 16th-century Genoese admiral Andrea Doria.[2][8]

Orbit and classification[edit]

Andrea Doria is a member of the Flora family, one of the largest families of stony asteroids in the main belt. It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,205 days). Its orbit has an eccentricity of 0.21 and an inclination of 4° with respect to the ecliptic.[1] A first precovery was taken at Palomar Observatory in 1950, extending the body's observation arc by 27 years prior to its official discovery observation at Zimmerwald.[8]

Physical characteristics[edit]

In October 2010, a rotational lightcurve of Andrea Doria was obtained from photometric observations by American amateur astronomer Ralph Megna. Lightcurve analysis gave a well-defined rotation period of 4.880 hours with a brightness variation of 0.25 magnitude (U=3).[a]

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Andrea Doria measures between 3.86 and 4.013 kilometers in diameter and its surface has an albedo between 0.392 and 0.417.[4][5][6] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, a S-type asteroid and the family's largest member and namesake – and calculates a diameter of 4.50 kilometers with an absolute magnitude of 13.9.[3]


This minor planet was named after Genoese admiral Andrea Doria (1466–1560), popularized in Friedrich Schiller's drama Fiesco.[2] Several ships, including the SS Andrea Doria, famous for its sinking off the coast of New England, had also been named after the admiral. The official naming citation was published by the Minor Planet Center on 22 September 1983 (M.P.C. 8151).[9]


  1. ^ a b Megna (2011) web: lightcurve plot of (2175) Andrea Doria, Megna, R. (2011) with a rotation period 4.880±0.001 hours with a brightness amplitude of 0.25 mag. Quality code of 3. Summary figures at Collaborative Asteroid Lightcurve Link


  1. ^ a b c d "JPL Small-Body Database Browser: 2175 Andrea Doria (1977 TY)" (2016-08-18 last obs.). Jet Propulsion Laboratory. Retrieved 12 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2175) Andrea Doria. Springer Berlin Heidelberg. p. 177. ISBN 978-3-540-00238-3. Retrieved 29 March 2017. 
  3. ^ a b c d e f "LCDB Data for (2175) Andrea Doria". Asteroid Lightcurve Database (LCDB). Retrieved 29 March 2017. 
  4. ^ 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. Bibcode:2012ApJ...759L...8M. arXiv:1209.5794Freely accessible. doi:10.1088/2041-8205/759/1/L8. Retrieved 29 March 2017. 
  5. ^ 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". The Astrophysical Journal. 791 (2): 11. Bibcode:2014ApJ...791..121M. arXiv:1406.6645Freely accessible. doi:10.1088/0004-637X/791/2/121. Retrieved 29 March 2017. 
  6. ^ 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. Bibcode:2011ApJ...741...90M. arXiv:1109.6407Freely accessible. doi:10.1088/0004-637X/741/2/90. Retrieved 29 March 2017. 
  7. ^ a b 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. Bibcode:2015Icar..261...34V. arXiv:1506.00762Freely accessible. doi:10.1016/j.icarus.2015.08.007. Retrieved 29 March 2017. 
  8. ^ a b "2175 Andrea Doria (1977 TY)". Minor Planet Center. Retrieved 29 March 2017. 
  9. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 29 March 2017. 

External links[edit]