1231 Property is a category of property defined in section 1231 of the U.S. Internal Revenue Code. 1231 property includes depreciable property and real property (e.g. buildings and equipment) used in a trade or business and held for more than one year. Some types of livestock, coal, timber and domestic iron ore are also included.
Project 1231 was a hybrid surface combatant and submarine developed in the Soviet Union in the 1960s. It was known as "Dolphin" (Russian: Дельфин) and "diving missile boat" (Russian: ныряющий катер-ракетоносец), and represented a fundamentally new type of ship.
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1231 (MCCXXXI) a fost un an obișnuit al calendarului iulian.
- Orbit and classification
- Physical characteristics
1231 Auricula is a carbonaceous background asteroid from the central regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 10 October 1931, by German astronomer Karl Reinmuth at the Heidelberg Observatory. The likely elongated C-type asteroid has a rotation period of 3.98 hours. It was named after the flowering plant auricula and indirectly honors astronomer Gustav Stracke.
Based on recent HCM-analyses, Auricula is a non-family asteroid that belongs to the main belt's background population. On its osculating Keplerian orbital elements, it is located in the Eunomia region, where the prominent family of stony asteroids is located. It orbits the Sun in the central main-belt at a distance of 2.4–2.9 AU once every 4 years and 4 months. Its orbit has an eccentricity of 0.09 and an inclination of 11° with respect to the ecliptic. The body's observation arc begins ...
This minor planet was named after the yellow flowered Alpine primrose, primula auricula. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955. It honors German astronomer and diligent orbit computer Gustav Stracke, who had asked that no asteroid be named after him. The initials of the asteroids through, all discovered by Karl Reinmuth, spell out "G. Stracke". In this manner, Reinmuth was able to circumvent Stracke's desire and honor him nevertheless
In the SDSS-based taxonomy, Auricula is a common, carbonaceous C-type asteroid.
1231 trong lịch khác; Lịch Gregory: 1231 MCCXXXI: Ab urbe condita: 1984: Năm niên hiệu Anh: 15 Hen. 3 – 16 Hen. 3 Lịch Armenia: 680 ԹՎ ՈՁ: Lịch Assyria: 5981: Lịch Ấn Độ giáo
RX J1131-1231 is a distant, supermassive-black-hole -containing quasar located about 6 billion light years from Earth in the constellation Crater. In 2014, astronomers found that the X-rays being emitted are coming from a region inside the accretion disk located about three times the radius of the event horizon.
- −12° 31′ 57.00″
- 11ʰ 31ᵐ 51.60ˢ
- 6.05 Gly