| 词条 | HD 172044 |
| 释义 |
epoch=J2000.0 | constell=Lyra | ra=18h 36m 37.3435s / 18h 36m 36.9s| dec=+33° 28' 8.531" / +33° 28' 2"| appmag_v=5.410 / 10.7}}{{Starbox character | class=B8II-IIIp... / ? | b-v=-0.09 / ? | u-b=-0.51 / ? |}}{{Starbox astrometry | radial_v=-26.3 / -27.4 | prop_mo_ra=-9.01 / ? | prop_mo_dec=-0.39 / ? | parallax=6.25 | p_error=0.53 |}}{{Starbox visbin | name=BD+33°3154B | period= | axis=7.3 | eccentricity= | inclination=205 | node= | periastron= }}{{Starbox catalog |{{Starbox reference |{{Starbox end}}HD 172044 and BD+33°3154B are two components of a binary star system in the constellation Lyra, approximately 520 light years away from Earth. 5th magnitude HD 172044 is a giant or subgiant star with the spectral type B8II-IIIp... The "p..." signifies that the star has a peculiar spectrum and spectral peculiarities have yet to be described. It is bluish white in color and has a surface temperature of 11,000 to 25,000 kelvins. It is therefore at least twice as hot as our Sun on its surface, and many times brighter and larger in size.[1] BD+33°3154B is an 11th magnitude star of an unknown spectral type.[2] References1. ^1 {{cite web | title=Simbad Query Result | work=Simbad | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=CCDM%20J18366%2B3328%20A | accessdate=October 16, 2007 }} 2. ^1 {{cite web | title=Simbad Query Result | work=Simbad | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=CCDM%20J18366%2B3328%20B | accessdate=October 16, 2007 }} External links
7 : Spectroscopic binaries|Lyra (constellation)|Henry Draper Catalogue objects|HR objects|B-type bright giants|Hipparcos objects|Durchmusterung objects |
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