323 Brucia
 | |
| Discovery[1] | |
|---|---|
| Discovered by | Max Wolf |
| Discovery date | 22 December 1891 |
| Designations | |
Named after | Catherine Wolfe Bruce |
| 1923 JA; 1934 JC[1] | |
| Mars-crossing asteroid[1] | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 123.73 yr (45191 d) |
| Aphelion | 3.0985 AU (463.53 Gm) |
| Perihelion | 1.6659 AU (249.22 Gm) |
| 2.3822 AU (356.37 Gm) | |
| Eccentricity | 0.30068 |
| 3.68 yr (1343.0 d) | |
Average orbital speed | 18.9 km/s |
| 359.397° | |
| 0° 16m 5.016s / day | |
| Inclination | 24.230° |
| 97.403° | |
| 291.250° | |
| Earth MOID | 0.804221 AU (120.3097 Gm) |
| Jupiter MOID | 2.61843 AU (391.712 Gm) |
| Jupiter Tisserand parameter | 3.361 |
| Physical characteristics | |
| Dimensions | 35.82±1.7 km (IRAS)[1] |
| Mass | 4.8×1016 kg (assumed) |
Mean density | 2? g/cm³ |
Equatorial surface gravity | 0.010 m/s² |
Equatorial escape velocity | 0.019 km/s |
| 9.463 h (0.3943 d)[1] | |
| 0.1765±0.018[1] | |
| Temperature | ~176 K |
| S[1] | |
| 11.2 to 15.8 | |
| 9.73[1] | |
|
| |
323 Brucia (/ˈbruːsiə/ BREW-see-ə or /ˈbruːʃə/ BREW-shə) was the first asteroid to be discovered by the use of astrophotography.[2] It was also the first of over 200 asteroids discovered by Max Wolf, a pioneer in that method of finding astronomical objects. Discovered on December 22, 1891, it was named in honour of Catherine Wolfe Bruce, a noted patroness of the science of astronomy, who had donated $10,000 for the construction of the telescope used by Wolf.
It will be an outer Mars-crossing asteroid with perihelion (q) less than 1.666 AU[1] until July 2017. For comparison, asteroid 4222 Nancita will become a Mars-crossing asteroid in June 2019. (6454) 1991 UG1 was a Mars-crossing asteroid until January 2016.[3]
It has a synodic rotation period of 9.46 hours (as of 1998).[4]
References
- 1 2 3 4 5 6 7 8 9 10 "JPL Small-Body Database Browser: 323 Brucia" (2011-06-24 last obs). Jet Propulsion Laboratory. Archived from the original on 23 February 2016. Retrieved 11 May 2016.
- ↑ Campbell, W. W. (1892). "Discovery of Asteroids by Photography". Publications of the Astronomical Society of the Pacific. 4 (26): 264. Bibcode:1892PASP....4..264C. doi:10.1086/120521.
- ↑ Webcite archive of asteroid 6454 with Epoch 2016
- ↑ Piironen, J.; et al. (March 1998), "Physical studies of asteroids. XXXII. Rotation periods and UBVRI-colours for selected asteroids", Astronomy and Astrophysics Supplement, 128: 525–540, Bibcode:1998A&AS..128..525P, doi:10.1051/aas:1998393.
