Delta Andromedae
Script error: No such module "Check for unknown parameters".
Delta Andromedae is a triple star[12] system in the northern constellation of Andromeda. Its identifier is a Bayer designation that is Latinized from δ Andromedae, and abbreviated Delta And or δ And, respectively. The system is visible to the naked eye as a point of light with a combined apparent visual magnitude of 3.28.[2] Based upon parallax measurements, it is located at a distance of approximately Script error: No such module "convert". from the Sun.[1] The system is drifting closer with a radial velocity of −10 km/s.[6]
In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Legs (asterism), refers to an asterism consisting of δ Andromedae, η Andromedae, 65 Piscium, ζ Andromedae, ι Piscium, ε Andromedae, π Andromedae, ν Andromedae, μ Andromedae, β Andromedae, σ Piscium, τ Piscium, 91 Piscium, υ Piscium, φ Piscium, χ Piscium and ψ1 Piscium. Consequently, the Chinese name for δ Andromedae itself is Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx.)[13] Apart from its Bayer designation, it was also given the title Delta by Elijah H. Burritt in his star atlas.[14]
This is a long-period spectroscopic binary with an orbital period of approximately 15,000 days (41 years). The primary of the spectroscopic binary, component Aa, has a stellar classification of K3 III, indicating that it is an aging giant star.[3][8] It most likely evolved from a F-type main sequence star after consuming the hydrogen at its core.[15] The secondary, component Ab, is a relatively faint K-type dwarf, which has been imaged using a stellar coronagraph. The pair have a physical separation of Script error: No such module "val"..[4]
The system has two companions, the closest of which is an orbiting red dwarf of class M3 with a separation of at least 940 astronomical units.[16][17]
An excess of infrared emission from δ Andromedae suggested that it may be surrounded by a shell of dust.[3][18] In 2003 it was determined that this is more likely a circumstellar debris disk.[15]
References
<templatestyles src="Reflist/styles.css" />
- ↑ a b c d e f Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "Citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1"..
- ↑ a b c Script error: No such module "citation/CS1"..
- ↑ Script error: No such module "citation/CS1". ID V/50. Accessed on line August 28, 2008.
- ↑ a b c Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1"..
- ↑ Script error: No such module "citation/CS1"..
- ↑ Template:Cite simbad
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日 Template:Webarchive
- ↑ Richard Hinckley Allen (1899) Star-names and Their Meanings, p. 38.
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "citation/CS1".
Script error: No such module "Check for unknown parameters".