Standard Star

Eta 21 Cyg

BS 7615

  • General Info.

  • Finder chart

  • Text data file

  • Other Stars

    		•

    HD

    188947

    SAO

    069116

    Mag.

    3.89

    Spc.

    K0III

    RA

    19 56 18.4

    Dec

    +35 05 00



    Wavelength (Å)

    Flux (photons/cm² /Å /s)

    3200 1.46
    3225 1.47
    3250 1.96
    3275 2.46
    3300 2.62
    3325 2.74
    3350 2.71
    3375 2.67
    3400 2.78
    3425 2.90
    3450 2.93
    3475 2.95
    3500 3.16
    3525 3.36
    3550 3.02
    3575 2.65
    3600 3.24
    3625 3.86
    3650 4.70
    3675 5.53
    3700 5.15
    3725 4.67
    3750 4.74
    3775 4.77
    3800 4.32
    3825 3.83
    3850 4.19
    3875 4.54
    3900 4.52
    3925 4.51
    3950 5.32
    3975 6.15
    4000 8.22
    4025 10.2
    4050 10.3
    4075 10.4
    4100 10.6
    4125 10.8
    4150 10.7
    4175 10.5
    4200 11.3
    4225 12.0
    4250 12.0
    4275 12.1
    4300 12.7
    4325 13.3
    4350 14.1
    4375 15.0
    4400 15.0
    4425 15.7
    4450 16.7
    4475 17.6
    4500 17.9
    4525 18.3
    4550 18.8
    4575 19.3
    4600 19.9
    4625 20.5
    4650 20.3
    4675 20.1
    4700 20.8
    4725 21.4
    4750 22.0
    4775 22.6
    4800 23.0
    4825 23.3
    4850 22.5
    4875 21.7
    4900 22.6
    4925 23.5
    4950 23.4
    4975 23.3
    5000 22.8
    5025 22.3
    5050 23.0
    5075 23.8
    5100 23.8
    5125 23.6
    5150 23.0
    5175 22.3
    5200 23.3
    5225 24.4
    5250 24.6
    5275 24.7
    5300 25.6
    5325 26.5
    5350 26.8
    5375 27.1
    5400 27.2
    5425 27.3
    5450 27.5
    5475 27.5
    5500 27.9
    5525 28.2
    5550 28.1
    5575 27.9
    5600 28.2
    5625 28.6
    5650 28.5
    5675 28.3
    5700 28.8
    5725 29.4
    5750 29.6
    5775 29.8
    5800 30.3
    5825 30.8
    5850 30.4
    5875 30.0
    5900 30.6
    5925 31.1
    5950 31.4
    5975 31.6
    6000 31.5
    6025 31.4
    6050 31.4
    6075 31.5
    6100 31.3
    6125 31.3
    6150 31.2
    6175 31.3
    6200 31.3
    6225 31.4
    6250 31.3
    6275 31.3
    6300 31.6
    6325 31.7
    6350 31.9
    6375 32.0
    6400 32.2
    6425 32.5
    6450 32.8
    6475 33.1
    6500 33.2
    6525 33.4
    6550 33.7
    6575 34.0
    6600 34.1
    6625 34.4
    6650 34.5
    6675 34.7
    6700 34.7
    6725 34.7
    6750 34.7
    6775 34.9
    6800 34.7
    6825 34.6
    6850 34.6
    6875 34.6
    6900 34.5
    6925 34.4
    6950 34.0
    6975 33.7
    7000 33.5
    7025 33.3
    7050 33.2
    7075 33.3
    7100 33.4
    7125 33.4
    7150 33.2
    7175 33.0
    7200 32.7
    7225 32.9
    7250 32.9
    7275 33.0
    7300 32.9
    7325 33.0
    7350 33.0
    7375 31.8
    7400 31.7
    7425 31.5
    7450 31.5
    7475 31.5
    7500 31.3
    7525 31.1
    7550 31.1
    7575 30.3
    7600 30.3
    7625 30.2
    7650 30.2
    7675 30.1
    7700 30.0
    7725 30.0
    7750 29.9
    7775 29.9
    7800 29.8
    7825 29.8
    7850 29.7
    7875 29.6
    7900 29.6
    7925 29.5
    7950 29.6
    7975 29.5
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