Archive for the ‘Astronomy, Science’ Category
My observation (9.124 (0.031) V), is shown under the cross-hairs in the images: Visual and Johnson V together and V alone.
Minimum should be happening around about now (~Aug 27).
I have images from Aug 25 that I’ll process this weekend. The conditions were less than ideal, but I managed to get some data before the clouds became a persistent problem.
I hope to take some more images this weekend.
Thanks to Peter Williams for prompting me to consider making observations of BL Tel which is nicely positioned high in the evening night sky now.
I’ve made 10 observations of the nova since March 19, mostly visual, 3 DSLR, one of which has yet to be processed.
The (rather noisy) light curve is starting to show the kind of early oscillations that seem to be common in novae and certainly the last two bright novae I’ve seen. The red fit “line” helps to make this more obvious.
The cross-hairs are over my most recent observation early this morning.
I made visual and DSLR photometric observations of the nova on March 21 and 22. The image below shows the nova before sunrise on March 22.
The light curve shows my most recent submission under the cross hairs.
It appears that the nova has peaked but these objects are unpredictable so we may see some fluctuations yet. The local weather has made observations difficult for the last 3 days.
The conditions at 6am today were not ideal: lots of intermittent cloud, or more accurately, intermittent gaps.
I estimated the nova to be at magnitude 4.9. It was substantially brighter than the 53 comparison star and may even have been brighter than the 47 comparison star (AAVSO chart ID 14582KC).
I marked the observation as “uncertain” (comment code Z on WebObs) and added the comment:
7×50 binoculars;AT LEAST mag 4.9;may have actually been brighter than 47 comp;intermittent cloud
Tomorrow morning, whether permitting, a brighter comparison star may be needed assuming this thing keeps brightening. Getting up early enough to make a DSLR observation would be nice too.
There’s a bright nova in Sagittarius (PNV J18365700-2855420 where PNV = possible nova candidate, its discovery designation).
Like the last bright southern nova (Nova Cen 2013), this one was also discovered by John Seach in NSW.
The nova was discovered on March 15 so it’s early days yet. There are 35 observations in the AAVSO International Database.
I tried to get out to observe it this morning but it was cloudy. When the weather clears I’ll make visual and time-permitting, DSLR observations.
My latest visual estimate of the nova is magnitude 6.0 (with comparison stars 6.0 and 6.1). Here’s the latest V and visual light curve.
The overall fading trend continues with some oscillations. The latest VSS newsletter has some interesting articles about the nova.
The nova is gradually on the way down, but it’s certainly not smooth. Here’s the latest light curve.
The cross-hair is on my latest visual estimate (5.85). Rob Jenkins (a fellow ASSA member) made a photometric observation (5.932, Johnson V) a couple of hours later. Subsequent visual estimates suggest the nova has brightened a little again.