Night report 2025-01-27

Observers: Simon de Wet, Hannah Wichern

Support: Giorgos Leloudas

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

Beginning (UT 00:29): relative humidity = 36%, temperature = 17.1 degrees Celsius, windspeed = 6.5 m/s, seeing = 0.57”

Middle (UT 05:00): relative humidity = 9.0%, temperature = 19.8 degrees Celsius, windspeed = 4.2 m/s, seeing = 0.85”

End (UT 08:30): relative humidity = 13.0%, temperature = 18.9  degrees Celsius, windspeed = 0.9 m/s, seeing =1.11”

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