Night report 2025-01-25

Observers: Simon de Wet, Hannah Wichern

Support: Giorgos Leloudas

TAT:  Michel Dennefeld, Sara Faris, Thallis de Lourenço Pessi

Beginning (UT 00:30): relative humidity = 39%, temperature = 17.5 degrees Celsius, windspeed = 4.6 m/s, seeing = 0.65”

Middle (UT 05:00): relative humidity = 36%, temperature = 17.0 degrees Celsius, windspeed = 3.9 m/s, seeing = 0.50”

End (UT 08:30): relative humidity = 30%, temperature = 18.0  degrees Celsius, windspeed = 2.1  m/s, seeing = 0.60”

Calibrations: Bias, dome flats, arcs (gr#11, gr#13, gr#13+GG495, gr#16, gr#16+OG530), UVgr evening sky flats.