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HD 176400


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CCD photometry and visual observations of V1663 Aquilae (Nova Aquilae 2005).
We present CCD V and I band photometry and visual observations of V1663Aquilae (Nova Aquilae 2005). This was a classical fast nova, probably oftype Ba, observed for the first time on 2005 June 9. Maximum lightoccurred at HJD= 2453531.2 +/- 0.2, when the apparent V magnitude was10.7 +/- 0.1 and the V-I colour index 3.1. Decline times were t2,V= 17d,t2,I= 18d, t3,V= 32d and t3,I= 35d. We derived a maximum absolute Vmagnitude of -7.8 +/- 0.2, colour excess E(B-V)= 2, extinction AV= 6magnitudes and distance d= 2.9 +/- 0.4 kpc. After maximum the V-I colourindex remained between 3.1 and 3.4 for 50 days, then gradually reducedas the nova became bluer with increasing age. We saw no direct evidenceof dust emission although this could have contributed to the highextinction in the direction of the nova.

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观测天体数据

星座:天鷹座
右阿森松:18h59m58.93s
赤纬:+04°36'39.0"
视星:7.434
距离:294.118 天文距离
右阿森松适当运动:-0.4
赤纬适当运动:-12.8
B-T magnitude:7.532
V-T magnitude:7.443

目录:
适当名称
HD 1989HD 176400
TYCHO-2 2000TYC 457-16-1
USNO-A2.0USNO-A2 0900-13740221
HIPHIP 93274

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