104 Herculis

Star in the constellation Hercules 250px A visual band light curve for V669 Herculis. The main plot shows the long-term variation (plotted from data published by Tabur et al.) and the inset plot shows the short-term periodic variation (adapted from Adelman and William). J2000 Hercules 18 11 54.15649 +31 24 19.2469 4.96 AGB M3 III 1.643 0.004 semiregular −1.19 0.29 −15.172 +25.084 5.8167 0.1769 −1.15 85.80 6.65 10.88 3535 24 commas 1202.3 42.1 commas 0.99 0.29 −0.08 0.10 A Her 104 Her V669 Her +31°3199 3448 167006 89172 6815 66737 1808+31B 104+Her 104 Herculis is a solitary variable star located around 560 light years away from the Sun in the northern constellation of Hercules. It has the variable star designation V669 Herculis and the Bayer designation A Herculis, while 104 Herculis is the Flamsteed designation. This object is visible to the naked eye as a dim, red-hued point of light with a baseline apparent visual magnitude of 4.96. It is moving closer to the Earth with a heliocentric radial velocity of −1.2 km/s. The variability of the brightness of 104 Herculis was announced by Joel Stebbins and Charles Morse Huffer in 1928, based on observations made at Washburn Observatory. It was given its variable star designation in 1977. This is an aging red giant star on the asymptotic giant branch with a stellar classification of M3 III. It is a semiregular variable with an amplitude of 0.14 in the B-band and pulsation periods of 22.9 and 24.0 days. Having exhausted the hydrogen at its core, the star has expanded to 86 times the Sun's radius. It is radiating 1,202 times the Sun's luminosity from its swollen photosphere at an effective temperature of commas 3,535 K. References 104 Her 2019-06-17 4591092238658088192 2004yCat.4027....0K VizieR Online Data Catalog: HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002) VizieR On-line Data Catalog: IV/27A. Originally Published in: Institute of Astronomy of Russian Academy of Sciences (2002) 4027 Kostjuk N. D. 2004 Kukarkin B. V. Kholopov P. N. Fedorovich V. P. Kireyeva N. N. Kukarkina N. P. Medvedeva G. I. Perova N. B. 62nd Name-List of Variable Stars Information Bulletin on Variable Stars March 1977 1248 1–25 1977IBVS.1248....1K https://ibvs.konkoly.hu/pub/ibvs/1201/1248.pdf 8 December 2024 XHIP: An extended hipparcos compilation Anderson E. Francis Ch. Astronomy Letters . 38 5 331 2012 2012AstL...38..331A 1108.4971 10.1134/S1063773712050015 119257644 Stebbins Joel Huffer C. M. The Constancy of the Light of Red Stars Publications of the Washburn Observatory 1928 15 137–174 1928PWasO..15..137S Eggleton P. P. Tokovinin A. A. A catalogue of multiplicity among bright stellar systems Monthly Notices of the Royal Astronomical Society 389 2 869–879 September 2008 10.1111/j.1365-2966.2008.13596.x free 2008MNRAS.389..869E 0806.2878 14878976 . 1 Prugniel Ph. Vauglin I. Koleva M. The atmospheric parameters and spectral interpolator for the MILES stars Astronomy & Astrophysics 531 A165 July 2011 10.1051/0004-6361/201116769 2011A&A...531A.165P . 1104.4952 54940439 Tabur V. Bedding T. R. Kiss L. L. Moon T. T. Szeidl B. Kjeldsen H. Long-term photometry and periods for 261 nearby pulsating M giants 1 Monthly Notices of the Royal Astronomical Society 400 4 1945–1961 December 2009 10.1111/j.1365-2966.2009.15588.x free . 2009MNRAS.400.1945T 0908.3228 15358380 1 Samus N. N. Kazarovets E. V. Durlevich O. V. Kireeva N. N. Pastukhova E. N. General Catalogue of Variable Stars 5.1 Astronomy Reports 2017 61 1 80–88 2017ARep...61...80S . 10.1134/S1063772917010085 125853869 The Perkins catalog of revised MK types for the cooler stars Keenan Philip C. McNeil Raymond C. Astrophysical Journal Supplement Series 71 245 1989 . 1989ApJS...71..245K 10.1086/191373 123149047 BVRI Photometry of nz Gem, HD 73017, HD 77247, RT Vir and 104 Her Adelman Saul J. Harrell William L. Baltic Astronomy . 15 363–381 2006 2006BaltA..15..363A Glass I. S. Van Leeuwen F. Semiregular variables in the solar neighbourhood Monthly Notices of the Royal Astronomical Society 378 4 1543–1549 2007 2007MNRAS.378.1543G 0704.3150 10.1111/j.1365-2966.2007.11903.x free 14332208 . Eggen Olin J. Asymptotic giant branch stars near the sun Astronomical Journal . 104 1 275–313 July 1992 10.1086/116239 1992AJ....104..275E Category:M3III stars Category:Semiregular variable stars Category:Hercules (constellation) Herculis, A Category:Durchmusterung objects Herculis, 104 167006 089172 6815 Herculis, V669 Category:Asymptotic-giant-branch stars