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Query : 2004A&A...418L..13F |
2004A&A...418L..13F - Astronomy and Astrophysics, volume 418, L13-16 (2004/4-4)
High-amplitude, long-term X-ray variability in the solar-type star HD 81809: The beginning of an X-ray activity cycle?
FAVATA F., MICELA G., BALIUNAS S.L., SCHMITT J.H.M.M., GUEDEL M., HARNDEN F.R.Jr, SCIORTINO S. and STERN R.A.
Abstract (from CDS):
Abstract Copyright: ∼
Journal keyword(s): stars: X-rays
Simbad objects: 5
Number of rows : 5 |
N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2023 |
#notes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | HD 81809 | SB* | 09 27 46.8088908054 | -06 04 17.008787302 | G1.5IV-V | 296 | 0 | |||||
2 | * alf Cen | ** | 14 39 40.4 | -60 50 20 | 0.4 | -0.1 | G2V+K1V | 936 | 0 | |||
3 | * 61 Cyg A | BY* | 21 06 53.9395895022 | +38 44 57.902349973 | 7.50 | 6.39 | 5.21 | 4.19 | 3.54 | K5V | 1024 | 0 |
4 | * 61 Cyg | ** | 21 06 53.95 | +38 44 57.9 | ~ | 175 | 0 | |||||
5 | * 61 Cyg B | Er* | 21 06 55.2638444466 | +38 44 31.358519864 | 8.63 | 7.40 | 6.03 | 4.86 | 3.55 | K7V | 712 | 0 |
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