1 Puppis

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

{{Starbox begin

| name = 1 Puppis

}}

{{Starbox image

|image=

{{Location mark

|image=Puppis constellation map.svg|alt=|float=center|width=280

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=1 Puppis

|x=450|y=597

}}

|caption=Location of 1 Puppis (circled)

}}

{{Starbox observe

| epoch = J2000

| constell = Puppis

| ra = {{RA|07|43|32.38668}}

| dec = {{DEC|−28|24|39.1887}}

| appmag_v = 4.59{{cite journal | bibcode=2002yCat.2237....0D | title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system | journal=CDS/ADC Collection of Electronic Catalogues | volume=2237 | last1=Ducati | first1=J. R. | year=2002 }}

}}

{{Starbox character

| type = AGB{{cite journal |bibcode=1992AJ....104..275E |title=Asymptotic Giant Branch Stars Near the Sun |last1=Eggen |first1=Olin J. |journal=The Astronomical Journal |date=1992 |volume=104 |page=275 |doi=10.1086/116239 }}

| class = M1III{{cite journal | bibcode=2008ApJS..176..216A | doi=10.1086/525529 | title=Visual Multiples. IX. MK Spectral Types | journal=The Astrophysical Journal Supplement Series | volume=176 | pages=216–217 | year=2008 | last1=Abt | first1=Helmut A. | issue=1 | doi-access=free }}

| b-v = +1.63

| u-b = +1.94

}}

{{Starbox astrometry

| radial_v = +32.40{{Cite journal | doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system| journal=Astronomy Letters| volume=32| issue=11| pages=759–771| year=2006| last1=Gontcharov| first1=G. A.|arxiv = 1606.08053 | s2cid=119231169}}

| prop_mo_ra = −13.782

| prop_mo_dec = +29.646

| parallax = 4.1384

| p_error = 0.1143

| parallax_footnote = {{cite Gaia DR3|5599927623535365888}}

| absmag_v = −2.24{{cite journal | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | title=XHIP: An extended hipparcos compilation | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | s2cid=119257644 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=V/137D/XHIP&HIP=37648 Vizier catalog entry]

}}

{{Starbox detail

| temperature = {{val|3,986|170|fmt=commas}}

| luminosity = 1,585 - 1,644{{cite journal |arxiv=1905.03744 |bibcode=2019AJ....158...20M |doi=10.3847/1538-3881/ab1cbd |title=A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2 |year=2019 |last1=Messineo |first1=M. |last2=Brown |first2=A. G. A. |journal=The Astronomical Journal |volume=158 |issue=1 |page=20 |s2cid=148571616 |doi-access=free }}

| radius = 84

| rotational_velocity = 1.0{{cite journal | bibcode=2005yCat.3244....0G | title=VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005) | journal=VizieR On-line Data Catalog: III/244. Originally Published in: 2005csss...13..571G; 2005yCat.3244....0G | volume=3244 | last1=Glebocki | first1=R. | last2=Gnacinski | first2=P. | year=2005 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=III/244/catalog&HIP=37648 Vizier catalog entry]

| gravity = 0.32{{cite journal | bibcode=2014AJ....147..137L | doi=10.1088/0004-6256/147/6/137 | title=Parameters and Abundances in Luminous Stars | journal=The Astronomical Journal | volume=147 | issue=6 | pages=137 | year=2014 | last1=Earle Luck | first1=R. | doi-access=free }}

| metal_fe = −0.19

}}

{{Starbox catalog

| names = {{odlist | F=1 Pup | V=NSV 3708 | CD=−28°4767 | HD=62576 | HIP=37648 | HR=2993 | SAO=174391 | CCDM=J07435-2825A | GC=10409 | GSC=06552-03227 | WDS=J07435-2825A }}{{cite simbad | title=1 Pup | access-date=2019-04-13 }}

}}

{{Starbox reference

| Simbad = 1+Puppis

}}

{{Starbox end}}

1 Puppis is a single{{cite journal | 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 | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | s2cid=14878976 }} star in the southern constellation of Puppis. It lies in the northern part of the constellation at a distance of about 790 ly, east of Aludra in Canis Major and just north of the white supergiant, 3 Puppis. This object is visible to the naked eye as a faint, red-hued star with an apparent visual magnitude of 4.59. It is moving further from the Earth with a heliocentric radial velocity of +32.4 km/s.

File:1PupLightCurve.png for 1 Puppis, plotted from Hipparcos data]]

The Hipparcos data for 1 Puppis shows low amplitude (0.007 magnitude) variability with a period of 1.8094 days.{{cite journal |last1=Koen |first1=Chris |last2=Eyer |first2=Laurent |title=New periodic variables from the Hipparcos epoch photometry |journal=Monthly Notices of the Royal Astronomical Society |date=March 2002 |volume=331 |issue=1 |pages=45–59 |doi=10.1046/j.1365-8711.2002.05150.x |arxiv=astro-ph/0112194 |bibcode=2002MNRAS.331...45K |doi-access=free }} The International Variable Star Index classifies the 1 Puppis as a star with starspots that cause the brightness to change as it rotates, and which varies in visual magnitude from 4.58 to 4.63.{{cite web |title=NSV 3708 |url=https://www.aavso.org/vsx/index.php?view=detail.top&oid=42332 |website=The International Variable Star Index |publisher=AAVSO |access-date=3 October 2022}}

This is a red giant star with a stellar classification of M1 III, having exhausted the hydrogen at its core and evolved away from the main sequence. The star is radiating 1,509 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,111 K. It has several visual companions: component B, of magnitude 13.7 and angular separation of {{Val|26|ul=arcsecond}}, C, of magnitude 9.21 and separation 78.8{{pprime}}, and D, of magnitude 10.84 and separation from C of 1.3{{pprime}}.{{cite journal | bibcode=2001AJ....122.3466M | doi=10.1086/323920 | title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal=The Astronomical Journal | volume=122 | issue=6 | pages=3466 | year=2001 | last1=Mason | first1=Brian D. | last2=Wycoff | first2=Gary L. | last3=Hartkopf | first3=William I. | last4=Douglass | first4=Geoffrey G. | last5=Worley | first5=Charles E. | doi-access=free }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=B/wds/wds&WDS=07435-2825 Vizier catalog entry] Component B is a background object.{{cite Gaia DR3|5599927623533992448}} Components C and D form the binary star HD 62557 and have a similar parallax and proper motion to 1 Puppis.{{cite Gaia DR3|5599927309996759936}}{{cite Gaia DR3|5599927314296426496}}

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