Astronomy:48 Doris
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| Discovery | |
|---|---|
| Discovered by | Hermann Mayer Salomon Goldschmidt |
| Discovery date | 19 September 1857 |
| Designations | |
| (48) Doris | |
| Pronunciation | /ˈdɔːrɪs/[1] |
| Named after | Doris |
| Minor planet category | Main belt |
| Adjectives | Dorian /ˈdɔːriən/[2] |
| Orbital characteristics[3] | |
| Epoch 31 December 2006 (JD 2454100.5) | |
| |{{{apsis}}}|helion}} | 500.093 Gm (3.343 AU) |
| |{{{apsis}}}|helion}} | 430.463 Gm (2.877 AU) |
| 465.278 Gm (3.110 AU) | |
| Eccentricity | 0.075 |
| Orbital period | 2003.453 d (5.49 a) |
| Mean anomaly | 336.191° |
| Inclination | 6.554° |
| Longitude of ascending node | 183.754° |
| 257.583° | |
| Physical characteristics | |
| Dimensions | c/a = 0.72±0.01[4] 278 km × 142 km[5] |
| Mean diameter | 215±3 km[4] 221.8±7.5 km (IRAS)[3] |
| Mass | (6.9±2.9)×1018 kg[4] (12.3±6.0)×1018 kg[lower-alpha 1][6] |
| Mean density | 1.32±0.55 g/cm3[4] 2.12±1.07 g/cm3[7] |
| Rotation period | 11.89 h[3] |
| Geometric albedo | 0.066[4] 0.062[8] |
| C[3] | |
| Absolute magnitude (H) | 6.90[3] |
Doris (minor planet designation: 48 Doris) is one of the largest main belt asteroids. It was discovered on 19 September 1857 by Hermann Goldschmidt from his balcony in Paris.
To find a name for the object, Jacques Babinet of the Academy of Sciences created a shortlist and asked the geologist Élie de Beaumont to make the selection. De Beaumont chose Doris, after an Oceanid in Greek mythology. Since Doris was discovered on the same night as 49 Pales, de Deaumont suggested naming the two "The Twins".[9]
Physical characteristics
An occultation on 19 March 1981 suggested a diameter of 219±25 km.[10] Observations of an occultation on 14 October 1999, using four well-placed chords, indicate an ellipsoid of 278×142 km and that 48 Doris is an extremely irregularly shaped object.[5]
Doris will pass within 0.019 AU of Pallas in June 2132.[11]
In popular culture
48 Doris is a location in the text-based science fiction game Federation 2.[citation needed]
Notes
- ↑ (6.1 ± 3.0) × 10−12 M☉
References
- ↑ "Doris". Merriam-Webster Dictionary. https://www.merriam-webster.com/dictionary/Doris.
- ↑ Dorian (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=Dorian (Subscription or UK public library membership required.)
- ↑ 3.0 3.1 3.2 3.3 3.4 "JPL Small-Body Database Browser: 48 Doris". https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=48.
- ↑ 4.0 4.1 4.2 4.3 4.4 P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
- ↑ 5.0 5.1 "Occultation of HIP 29126 by (48) Doris - 2001 November 28". Royal Astronomical Society of New Zealand. http://occsec.wellington.net.nz/planet/2001/plnres01.htm#Doris.
- ↑ Kochetova (2004)
- ↑ Masses and densities of minor planets - Yu. Chernetenko, O. Kochetova, and V. Shor
Kochetova (2004) - ↑ Asteroid Data Sets
- ↑ Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Springer Science & Business Media. p. 20. ISBN 978-3-540-00238-3. https://books.google.com/books?id=KWrB1jPCa8AC&pg=PA20.
- ↑ Ludek Vasta; Jan Manek (2005-07-26). "Observed Minor Planet Occultation Events". Asteroidal Occultations (Czech Astronomical Society). http://mpocc.astro.cz/world/mpocc1.txt.
- ↑ "JPL Close-Approach Data: 48 Doris". https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=48;cad=1#cad.
External links
- 48 Doris at AstDyS-2, Asteroids—Dynamic Site
- 48 Doris at the JPL Small-Body Database
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