Hello
I’m AhmadReza Hoseini from Alavi Association of Astronomy.
I and my َAstronomy students in Alavi high school in Tehran had a memorable Observation of Venus transit in 6 June 2012.
This sketch from Ali BabaNalbandi is the best in students’ sketches.
in addition, I attached some pictures of our observation for you.
Excuse us for the delay in sending this sketch.
We have got familiar with your site during this month and we hope to have better communications and interactions with you in future.
Sketch Properties:
Observer: Ali BabaNalbandi
Object Name: Venus Transit 2012
Object Type: Sun & Venus
Location: Alavi (High School) Association of Astronomy, Tehran, Iran
Date: 6 June 2012
Media: graphite pencil, charcoal, gouache, watercolor
Observing Tool: SkyWatcher 8″ Dob
Weather: Sunny and clear
seeing: very good
Yhank you
A.R. Hoseini
Astronomy Teacher at Alavi Association of Astronomy
(Alavi High school)
Please find attached my sketch about the Sun and the sunspots. This sketch has been made in Polaris observatory, Budapest, with the big 200/2470 refractor. This telescope has an awesome optic it shows the sunspots unbelievably detailed and beautiful. I used a 25 mm eyepiece.
That day it was 38 degrees in Celsius in Hungary, but on the other hand the seeing was great.
Date: 7th July 2012
Time: UT 12:30
Place: Budapest, Hungary
Equipment used: 200/2470, 89x
I used graphite pencils on white paper.
Object Name: Sun-Sunspots 1512-1513- 1515-1517
Location: Tehran-Iran
Date: July 3, 2012
Time: 14:00 Local Time (+3:30 GMT)
Media: Soft Pastels on Black Fabriano paper
Optic: 80 ED APO Refractor Telescope
Focal Length: 600 mm
Eyepiece: 9mm UWA- 1.25′′- 58º
An exciting day under the Sun. Observing with both a Coronado PST h-alpha & white light 8” Dob fitted with a 3.5” solar filter. Sketches were made at the eyepiece(s).
Seeing was good to excellent. After sketching details of the 4 sunspot groups I could readily see with the PST, I noticed one of the plages (bright spots) on the 1513 sunspot brightening intensely. As it brightened the bottom portion (to the South) of the plage developed a greenish/blue hued widening irregularity. There was also a linear band that extended from the widening directly to the center of sunspot 1513. Above the sunspot there appeared a filament which I tried to capture as well in my sketch. Within 5 minutes the dark patch was gone. From some research and asking more experienced friends, I believe I witnessed a solar flare, probably a minor one but still very exciting. I have been observing with the PST for over a month now, but this was a first for me. The plages around all the major sunspots continued to brighten & fade during the observation period, but none to the intensity of 1513. The PST was loaned to me by a friend after my excitement over white light observing. It’s a wonderful instrument showing many features of the Sun not evident in white light solar filters.
Solar prominences on the limb were also detailed today with the larger one appearing as somewhat of a vortex shape, while another more north prominence appeared as a broken loop. I had observed yesterday & did not see this broken loop then.
I moved to white light observing & could see much greater detail in all the sunspots, including many that did not show up well with the PST.
White light filters are primarily for observing details of the photosphere (like sunspots, facule & granulation), where h-alpha narrow bandwidth shows detail in the chromosphere. The chromosphere or “sphere of color” is the second of the three main layers in the Suns atmosphere and is roughly 2,000 kilometers deep. It sits just above the photosphere, and below the corona.
I am in love with the ever changing face of the sun. I am sometimes tired at night by the time the sky clears but the morning is always mine!
Coronado PST 40mm
9mm Plossl 44X
8” Dob w/ masked 3.5” Astro Baader Solar filter (homemade)
25mm Plossl 48X
This transit was our last chance to observe, you know. It was really interesting that I had literature exam!
OK, there are some words in the sketch in Persian, but I’ll translate them here.
It’s starting from that part which has :
Time: 2:44
Time: 2:59
Time: 3:29
Time: 3:59
Time: 4:29
Time: 4:59
Time: 5:29
Time: –:–
Time: –:–
(The times are not local.)
Object Name: Sun & Venus
Object Type: Star & Planet
Location: Tehran_Iran
Date: 06/6/2012
Media: White Paper + Black Pencil
Equipment: 130 mm Newt & Maylar Filter & 25 mm super plossl
Weather: Sunny
Object Name (Venus transit…)
Location (Néoules – Provence – France)
Date (06-06-2012 & 13-06-2012)
Media (red wine, graphite pencil, watercolour)
Refractor 1000/102
I made this sketch directly while the sun was rising, just with pencil on white paper.
I had to sketch very quickly.
Today, at home I used yellow watercolour and black for the dark part of the sky
For the clouds I used red wine pigment, from here we are in France.
I was on a hill, the time for this sketch was 3:50, 2 or 3 minutes before the theoretical sunrise time, so my telescope was downwardly inclined. Strange and fantastic souvenir.
Clear sky to you all
Michel Deconinck
Site Web: http://astro.aquarellia.com
