323 Brucia

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)
18.9 km/s
359.397°
 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 (/ˈbrsiə/ BREW-see-ə or /ˈbrʃə/ 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. 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.
    2. 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.
    3. Webcite archive of asteroid 6454 with Epoch 2016
    4. 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.

    External links


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