| absmag_v =
}}{{Starbox detail
| mass =
| radius =
| luminosity =
| temperature =
| metal_fe =
| rotational_velocity = 107[11]
| age_gyr =
}}{{Starbox catalog
| names = BD+26° 443, HD 16628, HIP 12489, HR 782, SAO 75510.[12]
}}{{Starbox reference
| Simbad = 33+Ari
}}{{Starbox end}}33 Arietis (abbreviated 33 Arietis) is a binary star[3] in the northern constellation of Aries. 33 Arietis is the Flamsteed designation. The combined apparent magnitude of 5.33[3] is bright enough to be seen with the naked eye. Based upon an annual parallax shift of 14.09 mas,[ the distance to this system is approximately {{Convert|231|ly|pc|abbr=off|lk=on}}.]
The primary component is an A-type main sequence star with a magnitude of 5.40 and a stellar classification of A3 V. It has a magnitude 8.40 companion at an angular separation of 28.6 arcseconds. An excess of infrared emission suggests the presence of circumstellar dust in this system. In the 24μm band, this debris disk has a mean temperature of 815 K, which puts it at a radius of 0.85 astronomical units (AU) from the primary star. Excess emission appears in the 70μm band, which has a temperature of 103 K and a radius out to 42 AU.[16]
References
1. ^1 {{citation | display-authors=1 | last1=Cowley | first1=A. | last2=Cowley | first2=C. | last3=Jaschek | first3=M. | last4=Jaschek | first4=C. | title=A study of the bright A stars. I. A catalogue of spectral classifications | journal=Astronomical Journal | volume=74 | pages=375–406 | doi=10.1086/110819 | bibcode=1969AJ.....74..375C | postscript=. |date=April 1969}}
2. ^1 {{citation | display-authors=1 | last1=Palmer | first1=D. R. | last2=Walker | first2=E. N. | last3=Jones | first3=D. H. P. | last4=Wallis | first4=R. E. | title=The radial velocities spectral types and projected rotational velocities of 633 bright northern A stars | journal=Royal Observatory Bulletin | volume=135 | page=385 | year=1968 | bibcode=1968RGOB..135..385P | postscript=. }}
3. ^1 {{citation | last1=Royer | first1=F. | last2=Zorec | first2=J. | last3=Gómez | first3=A. E. | title=Rotational velocities of A-type stars. III. Velocity distributions | journal=Astronomy and Astrophysics | volume=463 | issue=2 | pages=671–682 | doi=10.1051/0004-6361:20065224 | bibcode=2007A&A...463..671R | arxiv=astro-ph/0610785 | postscript=. |date=February 2007}}
4. ^1 2 {{citation | last1=Osawa | first1=K. | last2=Hata | first2=S. | title=Three colour photometry of B8-A2 stars | journal=Annals of the Tokyo Astronomical Observatory | volume=6 | page=148 | year=1960 | bibcode=1960AnTok...6..148O | postscript=. }}
5. ^1 2 3 {{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. |date=September 2008}}
6. ^1 {{cite simbad | title=33 Ari | accessdate=2012-08-15 }}
7. ^1 {{citation | display-authors=1 | last1=Trilling | first1=D. E. | last2=Stansberry | first2=J. A. | last3=Stapelfeldt | first3=K. R. | last4=Rieke | first4=G. H. | last5=Su | first5=K. Y. L. | last6=Gray | first6=R. O. | last7=Corbally | first7=C. J. | last8=Bryden | first8=G. | last9=Chen | first9=C. H. | title=Debris disks in main-sequence binary systems | journal=The Astrophysical Journal | volume=658 | issue=2 | pages=1264–1288 | doi=10.1086/511668 | bibcode=2007ApJ...658.1289T | arxiv=astro-ph/0612029 | postscript=. |date=April 2007}}