Data: Stellar Quadrant Observations – 5/17/19

Last night was a full moon which meant observing would be challenging, but the weather was too nice, and we’re in the season in which it’s sufficiently rare that I’m not at an event on a given weekend, so I couldn’t pass up observing. This time I was joined by his Excellency Josef von Rothenburg and his eldest daughter Maggie. As usual, observing details below the fold.

Object Alt Az ST Dec Error1
β Vir 53.0 180 11:52 1.72 0.04
ε Crv 28.55 180 12:07 -22.73 0.11
γ Crv 33.6 180 12:13 -17.68 0.14
η Vir 50.65 180 12:19 -0.63 -0.04
δ Crv 34.9 180 12:31 -16.38 -0.14
β Crv 27.85 180 12:33 -23.43 -0.03
ϒ Vir 49.75 180 12:38 -1.53 0.08
ε UMa 72.3 0 12:50 56.42 -0.46
δ Vir 54.45 180 12:52 3.17 0.22
ε Vir 62.2 180 12:59 11.52 -0.56
α Vir 40.15 180 13:23 -11.13 -0.03
ζ Uma 73.5 0 13:25 55.22 -0.29
ζ Vir 50.55 180 13:35 -0.73 0.13
Average -0.06
StDev 0.23

Despite the full moon, this was an excellent night of observing with some of the most accurate results yet. Many of the stars observed were ones that we’d gotten in the last observing session. However, Josef was able to contort himself into the right position to take the two observations in Ursa Major. Although the error was a bit high, given these were his first observations, I’d say he did quite well as the quadrant is a bit tricky to use and he was bent at an odd angle as well.

These most recent observations have added a fair amount to overall chart:

 

The stars we observed the past two sessions are shown in the slice just above and to the left of the 200 mark on the x-axis.

Next weekend is Valor tournament in Vatavia, and I’m not sure I’ll lug the quadrant all the way out there, but the week after there’s no event as Calontir will be prepping for Lilies war. That night will be close to a new moon, so as long as I can find an assistant, I’ll be out again!

  1. Error is vs modern published values and only for Dec.