324 Bamberga

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324 Bamberga
Discovery A
Discoverer Johann Palisa
Discovery date February 25, 1892
Alternate
designations B		 none
Category Main belt
Orbital elements C
Epoch 30 January 2005 (JD 2453400.5)
Eccentricity (e) 0.338
Semi-major axis (a) 401.409 Gm (2.683 AU)
Perihelion (q) 265.576 Gm (1.775 AU)
Aphelion (Q) 537.241 Gm (3.591 AU)
Orbital period (P) 1605.397 d (4.4 a)
Mean orbital speed 18.18 km/s
Inclination (i) 11.107°
Longitude of the
ascending node (Ω)		 328.058°
Argument of
perihelion (ω)		 44.062°
Mean anomaly (M) 4.564°
Physical characteristics D
Dimensions 229 km[1]
Mass 1.1×1019 kg[2]
Density 1.8 g/cm³
Surface gravity 0.014 m/s²
Escape velocity 0.23 km/s
Rotation period 1.226 d[3]
Spectral class C-type asteroid[4]
Absolute magnitude 6.82[1]
Albedo (geometric) 0.0628[1]
Mean surface
temperature		 ~172 K
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324 Bamberga is the 16th largest asteroid in the Main asteroid belt. It was discovered by Johann Palisa on February 25, 1892 in Vienna, making it one of the last large (diameter over 200 km) asteroids discovered. Apart from the near-earth asteroid Eros, it was the last asteroid which is ever easily visible with binoculars to be discovered.

Although its very high orbital eccentricity means its opposition magnitude varies greatly, at a rare opposition near perihelion Bamberga can reach a magnitude of 8.0, which is higher than Saturn's moon Titan ever reaches. Such near-perihelion oppositions occur on a regular cycle every twenty-two years, with the last occurring in 1991 and the next in 2013. Its brightness at these rare near-perihelion oppositions makes Bamberga the brightest C-type asteroid, roughly one magnitude brighter than 10 Hygiea's maximum brightness of around +9.1. Overall Bamberga is the tenth brightest main belt asteroid after, in order, Vesta, Pallas, Ceres, Iris, Hebe, Juno, Melpomene, Eunomia and Flora. Its high eccentricity (for comparison 36% higher than that of Pluto), though, means that at most oppositions other asteroids reach higher magnitudes.

It has an unusually long rotation period among the large asteroids. Its spectral class is intermediate between the C-type and P-type asteroids.[4]

An occultation of Bamberga was observed on 8 December 1987, and gave a diameter of about 228 km, in agreement with IRAS results.

[edit] Bamberga in fiction

See Asteroids in fiction.

[edit] Aspects

Stationary, than retrograde Opposition Distance to earth Brightness Stationary, than prograde Conjunction to Sun
11. June 2004 22. July 2004 1,12414 AE 9,2 mag 7. September2004 6. June 2005
12. December 2005 5. February2006 1,93398 AE 10,8 mag 31. March 2006 11. September2006
30. January 2007 2. April 2007 2,60499 AE 12,0 mag 30. May 2007 1. November 2007
11. April 2008 2. June 2008 1,86031 AE 11,0 mag 24. July 2008 8. February2009
11. November 2009 26. December 2009 1,27953 AE 9,7 mag 6. February2010 17. August 2010
11. January 2011 14. March 2011 2,50439 AE 11,8 mag 11. May 2011 12. October 2011
6. March 2012 4. May 2012 2,33964 AE 11,7 mag 28. June 2012 13. December 2012
1. August 2013 11. September 2013 0,81020 AE 8,1 mag 17. October 2013 11. July 2014
23. December 2014 19. February 2015 2,18479 AE 11,1 mag 17. April 2015 22. September 2015
10. February2016 12. April 2016 2,57270 AE 12,0 mag 8. June 2016 13. November 2016
8. May 2017 23. June 2017 1,51075 AE 10,3 mag 12. August 2017 9. April 2018
30. November 2018 20. January 2019 1,63822 AE 10,4 mag 11. March 2019 31. August 2019
21. January 2020 23. March 2020 2,58273 AE 11,9 mag 20. May 2020 21. October 2020

[edit] References

  1. ^ a b c Tedesco, E.F.; Noah, P.V.; Noah, M.; Price, S.D. (2004). IRAS Minor Planet Survey. IRAS-A-FPA-3-RDR-IMPS-V6.0.. NASA Planetary Data System. Retrieved on 2007-03-15.
  2. ^ Pitjeva, E. V. (2005). "High-Precision Ephemerides of Planets—EPM and Determination of Some Astronomical Constants" (PDF). Solar System Research 39 (3): 176. DOI:10.1007/s11208-005-0033-2. 
  3. ^ Harris, A. W.; Warner, B.D.; Pravec, P.; Eds. (2006). Asteroid Lightcurve Derived Data. EAR-A-5-DDR-DERIVED-LIGHTCURVE-V8.0.. NASA Planetary Data System. Retrieved on 2007-03-15.
  4. ^ a b Neese, C.; Ed. (2005). Asteroid Taxonomy.EAR-A-5-DDR-TAXONOMY-V5.0.. NASA Planetary Data System. Retrieved on 2007-03-15.


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For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.

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