375 Ursula

375 Ursula
Discovery
Discovered by Auguste Charlois
Discovery date September 18, 1893
Designations
Pronunciation /ˈɜrsjʊlə/ or /ˈɜrsələ/[1]
1893 AL
Main belt
Orbital characteristics
Epoch 30 January 2005 (JD 2453400.5)
Aphelion 3.46 AU (517.593 Gm)
Perihelion 2.789 AU (417.247 Gm)
3.125 AU (467.42 Gm)
Eccentricity 0.107
5.52 a (2017.268 d)
16.85 km/s
85.323°
Inclination 15.931°
336.686°
344.757°
Physical characteristics
Dimensions 191.65 ± 4.01 km[2]
216±10 km[3][4][5]
Mass (8.45 ± 5.26) × 1018[2] kg
Mean density
 2.29 ± 1.43[2] g/cm3
16.83 hr[4]
7.47[4]

    375 Ursula is one of the largest asteroids from the asteroid belt. It was discovered by Auguste Charlois on September 18, 1893, in Nice.

    Observations of an occultation on November 15, 1984, produced six chords indicating an estimated diameter of 216±10 km.[3]

    Asteroid 375 Ursula (apparent magnitude 11.4) near the star TYC 581-36-1 (magnitude 11.9). The two galaxies are about magnitude 15.

    References

    1. ↑ UR-sew-lə or UR-sə-lə
    2. ↑ 2.0 2.1 2.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    3. ↑ 3.0 3.1 Millis, R.L; Wasserman, Bowell, Franz, Klemola, Dunham (1984). "The diameter of 375 URSULA from its occultation of AG + 39 deg 303". Astronomical Journal 89: 592–596. Bibcode:1984AJ.....89..592M. doi:10.1086/113553.
    4. ↑ 4.0 4.1 4.2 "JPL Small-Body Database Browser: 375 Ursula (1893 AL)". Retrieved 2008-05-22.
    5. ↑ "Occultation of UCAC2 12060928 by 375 Ursula". Royal Astronomical Society of New Zealand. 2008-05-27. Retrieved 2008-11-30.

    External links