Chi Ceti

{{Starbox begin

| name = Chi Ceti

}}

{{Starbox image

| image = 250px

| caption = A light curve for EZ Ceti, plotted from TESS data

}}

{{Starbox observe 2s

| epoch = J2000.0

| equinox = J2000.0 (ICRS)

| constell = Cetus

| component1 = HD 11171

| ra1 = {{RA|01|49|35.10277}}

| dec1 = {{DEC|−10|41|11.0719}}

| appmag_v1 = 4.66

| component2 = HD 11131

| ra2 = {{RA|01|49|23.34886}}

| dec2 = {{DEC|−10|42|14.0839}}

| appmag_v2 = 6.75

}}

{{Starbox character

| component = HD 11171

| class = F3 III or F0 V

| b-v = +0.33

| u-b = +0.04

| r-i =

| variable =

}}

{{Starbox character

| no_heading = y

| component = HD 11131

| class = G3 V

| b-v = +0.61

| u-b = +0.12

| r-i =

| variable = BY Dra

}}

{{Starbox astrometry

| component1 = HD 11171

| radial_v = −1.8

| prop_mo_ra = −147.867

| prop_mo_dec = −93.480

| parallax = 42.5848

| p_error = 0.1249

| parallax_footnote =

| absmag_v = {{Val|+2.83|0.01}}

| component2 = HD 11131

| radial_v2 = {{Val|−3.89|0.12}}

| prop_mo_ra2 = −159.846

| prop_mo_dec2 = −70.666

| parallax2 = 41.8

| p_error2 = 0.2579

| parallax_footnote2 =

| absmag_v2 = 4.98

}}

{{Starbox detail

| source =

| component1 = HD 11171

| mass = 1.36

| radius =

| luminosity = 5.6

| temperature = {{Val|6746|258|fmt=commas}}

| gravity =

| metal_fe = 0.14

| rotational_velocity =

| age_gyr = 1.2

| component2 = HD 11131

| temperature2 = 5,804

| gravity2 = 4.53

| metal2_fe = −0.09

| rotational_velocity2 = 3.34

}}

{{Starbox catalog

| names = χ Cet, Gj 9061, ENG 8

| component1 = χ Ceti A

| names1 = 53 Cet, HD 11171, BD−11°352, FK5 1051, HIP 8497, HR 531, SAO 148036

| component2 = χ Ceti B

| names2 = EZ Cet, HD 11131, BD−11°351, HIP 8486, SAO 148033

}}

{{Starbox reference

| Simbad=Chi+Ceti|sn = χ Ceti

| Simbad2=HD+11171|sn2 = χ Ceti A

| Simbad3=HD+11131|sn3 = χ Ceti B

}}

Chi Ceti (χ Ceti), is the Bayer designation for a double star in the equatorial constellation of Cetus. They appear to be common proper motion companions, sharing a similar motion through space. The brighter component, HD 11171, is visible to the naked eye with an apparent visual magnitude of 4.66, while the fainter companion, HD 11131, is magnitude 6.75. Both lie at roughly the same distance, with the brighter component lying at an estimated distance of 76.6 light years from the Sun based upon an annual parallax shift of {{val|42.58|ul=mas}}.

The primary, component A, is an evolved K-type giant star with a stellar classification of F3 III. However, Houk and Swift (1999) listed a classification of F0 V, which would match an F-type main sequence star. It displays an infrared excess at a wavelength of 70 μm and thus is a candidate host of an orbiting debris disk.

The common proper motion companion, component B, is a G-type main sequence star with a classification of G3 V. It is a BY Draconis variable with a periodicity of 8.92 days and a variable star designation of EZ Cet.

References

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{{cite simbad | mode=cs2

| title=chi Cet

| accessdate=2017-02-12 | postscript=. }}

{{citation

| title=V* EZ Cet

| postscript=. }}

}}

External links

{{citation

| title=Chi Ceti, plus HD 11131

| first1=James B. | last1=Kaler | work=Stars

| publisher=University of Illinois

| url=http://stars.astro.illinois.edu/sow/chicet.html

| access-date=2017-02-13 | postscript=. }}

http://www.alcyone.de/cgi-bin/search.pl?object=HR0531 {{Webarchive|url=https://web.archive.org/web/20160303223748/http://www.alcyone.de/cgi-bin/search.pl?object=HR0531 |date=2016-03-03 }}
http://server3.wikisky.org/starview?object_type=1&object_id=1287

Cetus, Chi A

Cetus, Chi B

Category:Double stars

Category:BY Draconis variables

9061