| 词条 | 304 Olga | ||
| 释义 |
| minorplanet=yes | background=#D6D6D6 | name=304 Olga | discoverer=Johann Palisa | discovered=14 February 1891 | mpc_name=(304) Olga | alt_names= | mp_category=Main belt | epoch=31 July 2016 (JD 2457600.5) | semimajor={{Convert|2.40286|AU|Gm|abbr=on}} | perihelion={{Convert|1.86853|AU|Gm|abbr=on}} | aphelion={{Convert|2.93719|AU|Gm|abbr=on|lk=on}} | eccentricity=0.22237 | period=3.72 yr (1360.5 d) | inclination=15.8530° | asc_node=159.080° | arg_peri=172.423° | mean_anomaly=63.6148° | dimensions={{val|67.86|2.1|ul=km}}[1] 70.30 ± 2.32 km | mass={{nowrap|(1.15 ± 1.12) × 1018 kg}} | density= | rotation={{Convert|18.36|h|d|abbr=on|lk=on}} | spectral_type=C | abs_magnitude=9.74 | albedo={{val|0.0488|0.003}} | mean_motion={{Deg2DMS|0.264613|sup=ms}} / day | orbit_ref=[1] | observation_arc=124.78 yr (45577 d) | uncertainty=0 }} Olga (minor planet designation: 304 Olga) is a large Main belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous material. It was discovered by Johann Palisa on 14 February 1891 in Vienna. 304 Olga was identified as one of three asteroids that were likely to be a parent body for chondrites along with 449 Hamburga and 335 Roberta.[2] All three asteroids were known to have low-albedo (not reflect as much light) and be close to "meteorite producing resonances".[2] Chrondrites are the most common type of meteor found on Earth, accounting for over 80% of all meteors.[3] They are named for the tiny spherical silicate particles that are found inside them (those particles are called chondrules).[3] References1. ^1 {{Cite web |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=304;cad=1 |title=304 Olga |work=JPL Small-Body Database |publisher=NASA/Jet Propulsion Laboratory |access-date=11 May 2016}} See Table 1.2. ^1 [https://books.google.com/books?id=kJDvAAAAMAAJ&q=%22449+Hamburga%22&dq=%22449+Hamburga%22&hl=en&sa=X&ved=0CBwQ6AEwADgeahUKEwiz86-8xNPHAhUEj4AKHdbtB-E Lunar and planetary science: abstracts of papers submitted to the ... Lunar and Planetary Science Conference, Volume 27, Part 1 - Lunar and Planetary Institute, Jan 1, 1996] 3. ^1 [https://meteorites.asu.edu/meteorites/meteorite-types/stony-meteorites/chondrites ASU - Chondrites] }} External links
7 : Background asteroids|Discoveries by Johann Palisa|Minor planets named for people|Named minor planets|C-type asteroids (Tholen)|Xc-type asteroids (SMASS)|Astronomical objects discovered in 1891 |
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