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Nova Aquila 1918
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V603 Aquilae was the brightest nova recorded in the last 300 years. The first sighting was made on the night of June 8, 1918, and was viewed as an object of the first magnitude about 6° north of the star cloud in the Milky Way of Scutum Among the first to observe it there was E. Barnard. At the time of discove...
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HD 203504
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1 Pegasi (also HD 203504, HR 8173, HIP 105502 and SAO 107073) is a magnitude +4.09 spectroscopic binary star located 156 light-years away in the constellation Pegasus. 1 Pegasi is a giant orange star of spectral type K1III with an effective temperature of 4671 ± 24 K. It is 60 times more luminous than t...
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HD 202448
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Alpha Equulei (also HD 202448, HR 8131, HIP 104987, SAO 126662 and Kitalpha) is a magnitude +3.92 spectroscopic binary star located 186 light-years away in the constellation Equuleus. Alpha Equulei is a yellow subgiant star of spectral type G0III with an effective temperature of around 5500 - 600...
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Z Ursae Majoris
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Title: Changes in the spectrum of Z Ursae Majoris during its rise through a maximum in June 2014 Author: David Boyd The semiregular variable Z UMa experienced a particularly deep minimum at the end of March 2014 followed by a three month rise to maximum. The rise and subsequent decline were followed w...
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DE0823-49
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Title: DE0823-49 is a juvenile binary brown dwarf at 20.7 pc Author: J. Sahlmann, A. J. Burgasser, E. L. Martín, P. F. Lazorenko, D. C. Bardalez Gagliuffi, M. Mayor, D. Ségransan, D. Queloz, S. Udry Astrometric monitoring of the nearby early-L dwarf DE0823-49 has revealed a low-mass companion in a 2...
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W Cygni
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W Cygni is a semi-regular red giant variable star located 618 light-years away in the constellation Cygnus. It has a magnitude range of +5.10 and +6.83, with a period of 131 days. The variable star was discovered by amateur Irish astronomer John Ellard Gore (1845-1910) in 1884 Right ascension 21h 3...
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HD 115600
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Discovery Harkens to Early Solar System Using the Gemini Planet Imager (GPI) at the Gemini South telescope in Chile, astronomers have discovered a young, emerging planetary system that shares remarkable similarities to our own Solar System in its infancy. GPI images reveal the disk as a bright ri...
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MOA-2007-BLG-197
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Title: MOA-2007-BLG-197: Exploring the brown dwarf desert Author: C. Ranc (1 and 35), A. Cassan (1 and 35), M. D. Albrow (2 and 35), D. Kubas (1 and 35), I. A. Bond (3 and 36), V. Batista (1 and 35), J.-P. Beaulieu (1 and 35), D. P. Bennett (4 and 36), M. Dominik (5 and 35), Subo Dong (6 and 37), P. Fouqué (7 and...
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Lambda Geminorum
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Lambda Geminorum (54 Geminorum, HIP 35350) is a class A3, fourth-magnitude star in the constellation Gemini. Read more
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V409 Tauri
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Title: V409 Tau As Another AA Tau: Photometric Observations of Stellar Occultations by the Circumstellar Disk Author: Joseph E. Rodriguez, Joshua Pepper, Keivan G. Stassun, Robert J. Siverd, Phillip Cargile, David A. Weintraub, Thomas G. Beatty, B. Scott Gaudi, Eric E. Mamajek, Nicole Sanchez...
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NaSt1
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Hubble Observes One-of-a-Kind Star Nicknamed 'Nasty' Astronomers have spent decades trying to determine the oddball behaviour of an ageing star nicknamed "Nasty 1" residing in our Milky Way galaxy. Nasty 1 was identified as a Wolf-Rayet star, a rapidly evolving star that is much more...
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HD 169142
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Title: Mid-IR imaging of the transitional disk of HD169142: Measuring the size of the gap Authors: M. Honda, Koen Maaskant, Y. K. Okamoto, H. Kataza, M. Fukagawa, L. B. F. M. Waters, C. Dominik, A. G. G. M. Tielens, G. D. Mulders, M. Min, T. Yamashìta, T. Fujiyoshi, T. Miyata, S. Sako, I. Sakon, H. Fujiw...
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M31N 2015-01a
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ATel 6941: Spectroscopic confirmation and additional photometry of the very bright nova M31N 2015-01a
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Scorpius-Centaurus Association
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Title: Discovery of Seven Companions to Intermediate Mass Stars with Extreme Mass Ratios in the Scorpius-Centaurus Association Author: Sasha Hinkley (Exeter), Adam L. Kraus (UT), Michael J. Ireland (ANU), Anthony Cheetham (Sydney), John M. Carpenter (Caltech), Peter Tuthill (Sydney), Sylv...
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PZ Monocerotis
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Title: PZ Mon is a new RS CVn synchronous binary giant with low mass ratio Author: Y. V. Pakhomov, N. A. Gorynya Analysis of new radial velocity measurements of the active giant PZ Mon is presented. We estimated the radial velocity of center of mass 25.5±0.3 km s-1, the period on the circular orbit P=34...
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