44 Andromedae

{{Short description|Star in the constellation Andromeda}}

{{Starbox begin

| name = 44 Andromedae}}

{{Starbox image

| image=

{{Location mark

|image=Andromeda constellation map.svg|alt=|float=center|width=260

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=44 Andromedae

|x=446|y=388

}}

|caption=Location of 44 Andromedae (circled)

}}

{{Starbox observe

| epoch = J2000.0

| equinox = J2000.0 (ICRS)

| constell = Andromeda

| ra = {{RA|01|10|18.74041}}

| dec = {{DEC|+42|04|53.3100}}

| appmag_v= 5.67{{citation | last1=Guetter | first1=H. H. | last2=Hewitt | first2=A. V. | title=Photoelectric UBV photometry for 317 PZT and VZT stars | journal=Publications of the Astronomical Society of the Pacific | volume=96 | pages=441–443 | date=June 1984 | doi=10.1086/131362 | bibcode=1984PASP...96..441G | postscript=. | doi-access=free }}

}}

{{Starbox character

| class = F8 V

| b-v = +0.59

| u-b = +0.12

}}

{{Starbox astrometry

| radial_v = {{Val|−14.2|0.2}}{{citation | last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C. | title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project | journal=Astronomy & Astrophysics | volume=546 | id=A61 | pages=14 | date=October 2012 | doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D | arxiv=1208.3048 | s2cid=59451347 | postscript=. }}

| prop_mo_ra = {{val|−135.569|(38)}}

| prop_mo_dec = {{val|−41.790|(30)}}

| parallax = 18.8145

| p_error = 0.0376

| parallax_footnote =

| absmag_v = +2.07[http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=V/117A/newcat.dat&recno=725 HD 6920], database entry, The Geneva-Copenhagen Survey of Solar neighbourhood, J. Holmberg et al., 2007, CDS ID [http://vizier.u-strasbg.fr/viz-bin/Cat?V/117A V/117A]. Accessed on line November 19, 2008.

}}

{{Starbox detail

| source = {{citation | display-authors=1 | last1=Marsden | first1=S. C. | last2=Petit | first2=P. | last3=Jeffers | first3=S. V. | last4=Morin | first4=J. | last5=Fares | first5=R. | last6=Reiners | first6=A. | last7=do Nascimento | first7=J.-D. | last8=Aurière | first8=M. | last9=Bouvier | first9=J. | last10=Carter | first10=B. D. | last11=Catala | first11=C. | last12=Dintrans | first12=B. | last13=Donati | first13=J.-F. | last14=Gastine | first14=T. | last15=Jardine | first15=M. | last16=Konstantinova-Antova | first16=R. | last17=Lanoux | first17=J. | last18=Lignières | first18=F. | last19=Morgenthaler | first19=A. | last20=Ramìrez-Vèlez | first20=J. C. | last21=Théado | first21=S. | last22=Van Grootel | first22=V. | last23=BCool Collaboration | title=A BCool magnetic snapshot survey of solar-type stars | journal=Monthly Notices of the Royal Astronomical Society | volume=444 | issue=4 | pages=3517–3536 | date=November 2014 | doi=10.1093/mnras/stu1663 | doi-access=free | bibcode=2014MNRAS.444.3517M | arxiv=1311.3374 | s2cid=53988884 | postscript=. }}

| mass = 1.64

| luminosity = 12.9

| rotational_velocity = {{Val|11.6|0.8}}

| rotation = 15.2 d

| radius = {{Val|3.58|0.19}}

| temperature = {{Val|6028|32|fmt=commas}}

| metal_fe = {{Val|−0.01|0.04}}

| gravity = {{Val|3.78|0.07}}

| age_gyr = 2.59

}}

{{Starbox catalog

| names = {{odlist | F=44 And | BD=+41°219 | FK5=2075 | GJ=53.4 | HD=6920 | HIP=5493 | HR=340 | SAO=36984 | GC=1410 | PPM=43709 }}{{cite simbad |title=44 And |access-date=2017-12-28}}

}}

{{Starbox reference

| Simbad = 44+and

}}

{{Starbox end}}

44 Andromedae is a single,{{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 |date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E | postscript=. |arxiv = 0806.2878 | s2cid=14878976 }} yellow-white hued star in the northern constellation of Andromeda. 44 Andromedae is the Flamsteed designation. It has an apparent visual magnitude of approximately 5.67, which indicates it is a dim star that is just visible to the naked eye on a dark night. The annual parallax shift as measured by the Hipparcos spacecraft is 18.8145 mas, which yields a distance estimate of around 173 light years. It is moving closer to the Sun with a radial velocity of −14 km/s.

This star has been assigned a stellar classification of F8 V, which indicates it is an ordinary F-type main-sequence star. However, Gray et al. (2001) gave it a class of F9 IV, suggesting it is instead a subgiant star that is evolving away from the main sequence as the hydrogen fuel at its core becomes exhausted.{{citation | last1=Gray | first1=R. O. | last2=Napier | first2=M. G. | last3=Winkler | first3=L. I. | title=The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars | journal=The Astronomical Journal | volume=121 | issue=4 | pages=2148–2158 | date=April 2001 | doi=10.1086/319956 | bibcode=2001AJ....121.2148G | postscript=. | doi-access= }} It is an estimated 2.6 billion years old and is rotating with a period of 15.2 days. The star has 1.64 times the mass of the Sun and 3.6 times the Sun's radius. It is radiating 13 times the Sun's luminosity from its photosphere at an effective temperature of 6,028 K. It appears overluminous for a star of its type which may indicate the presence of a bright companion, but no radial velocity variation has been detected.{{citation | title=The Nature of Overluminous F Stars Observed in a Radial-Velocity Survey | last1=Griffin | first1=R. F. | last2=Suchkov | first2=A. A. | journal=The Astrophysical Journal Supplement Series | volume=147 | issue=1 | pages=103–144 | date=July 2003 | doi=10.1086/367855 | bibcode=2003ApJS..147..103G | postscript=. | doi-access=free }}