2175 Andrea Doria

2175 Andrea Doria

Discovery [1]
Discovered by	P. Wild
Discovery site	Zimmerwald Obs.
Discovery date	12 October 1977
Designations
MPC designation	(2175) Andrea Doria
Named after	Andrea Doria (16th-century admiral)[2]
Alternative designations	1977 TY · 1964 VY1 1967 RS · 1967 TE
Minor planet category	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
Semi-major axis	2.2155 AU
Eccentricity	0.2074
Orbital period (sidereal)	3.30 yr (1,205 days)
Mean anomaly	44.452°
Mean motion	0° 17^m 56.04^s / day
Inclination	3.7056°
Longitude of ascending node	222.09°
Argument of perihelion	143.68°
Physical characteristics
Dimensions	3.86±0.14 km[4] 3.922±0.042[5] 4.013±0.021 km[6] 4.50 km (calculated)[3]
Synodic rotation period	4.880±0.001 h[a]
Geometric albedo	0.24 (assumed)[3] 0.392±0.067[4] 0.3997±0.0568[6] 0.417±0.057[5]
Spectral type	S [3][7]
Absolute magnitude (H)	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

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

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]

Naming

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]

Notes

1. 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

References

1. "JPL Small-Body Database Browser: 2175 Andrea Doria (1977 TY)" (2016-08-18 last obs.). Jet Propulsion Laboratory. Retrieved 12 June 2017.
2. Schmadel, Lutz D. (2007). "(2175) Andrea Doria". Dictionary of Minor Planet Names – (2175) Andrea Doria. Springer Berlin Heidelberg. p. 177. doi:10.1007/978-3-540-29925-7_2176. ISBN 978-3-540-00238-3.
3. "LCDB Data for (2175) Andrea Doria". Asteroid Lightcurve Database (LCDB). Retrieved 29 March 2017.
4. 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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 29 March 2017.
5. 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. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 29 March 2017.
6. Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
7. 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:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 29 March 2017.
8. "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

• MacAstronomy.com, homepage of Ralph Megna
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 2175 Andrea Doria at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 2175 Andrea Doria at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters