20th Century Observers
|
Historical Sunspot Drawing Resource Page: 20th Century Observers |
North Carolina, United States.
Observations from ?
Number of drawings unknown.
Drawing example.
Ref.
Mt. Wilson California, United States.
Observations every clear day from January 4, 1917 to present.
25,500+ drawings by various observers.
12-inch aperture refractor, 150-foot focal length.
Observation method: direct objective projection, 17-inch image.
All original drawings on file in observatory archives, some scanned images are located here.
Current MWO sunspot drawing example.
Observer drawing examples: Ellerman, Nicholson, Dockman, Joy, Brackett, Humason, Benioff,
Hickox, Richardson, Hoge, Cragg, Adkins, Gregory, Padilla, Webster, Gilman, Shieber,
Ref.
Stonyhurst College Observatory, England.
Observations c.1919-1920.
Number of observations: ?
Observation method: Direct viewing with attenuated eyepiece?
Location of original drawings: ?
Drawing examples: 1, 2.
Ref.
Mitaka near Tokyo, Japan.
Observations from January 1929 to March 1999.
203mm f/18 Zeiss refractor.
Observation method: Eyepiece projection method, 24cm image.
Drawings archived at Solar Activity World Data Center, Tokyo.
Drawing examples: 1, 2.
Observatory Website.
Ref.
Germany.
Observations from June 1942 to present.
8300+ drawings.
80mm f/24 refractor.
Observation method: eyepiece projection, 19.5cm image.
Drawings in observatory archives.
Drawing example.
Observatory Website.
United States - Australia.
Observations from January 1944 to present.
16,000+ drawings.
Various reflecting telescopes all stopped down to 4.25 inches to retain original k-factor.
Observation method: attenuated eyepiece, drawn to 6.5-inch circle.
Drawing archive personally owned and maintained by Mr. Cragg.
Drawing examples from 1999: 1, 2.
Ref.
Japan.
Observations from 1944 to 1984?
8,000+ drawings.
20cm refractor.
Observation method: eyepiece projection, 30cm image.
Drawings archived at National Science Museum of Tokyo?
Drawing example.
Ref.
Istanbul, Turkey.
Observations from August 1, 1946 to present.
11,870+ drawings.
200mm f/15mm Ziess equatorial refractor.
Eyepiece projection method, 25cm image.
Drawings in observatory archives.
Drawing examples: 1, 2.
Contact: Dr. Tamer Atac.
Ref.
Austria.
Observations from 1947 to present. (Some available before 1947)
14,000+ drawings.
110mm, f/15 refractor.
Observation method: enlargement lens projection, 25cm image.
Drawings on file in the observatory archives will be available online next year.
Drawing example.
Kanzelhöhe Solar Observatory Website.
Yunnan, China.
Observations from 1956 to present?
130mm refractor.
Observation method: eyepiece projection, image 17.4cm.
Original drawings in observatory archives?
Drawing example.
Ref.
Philippines.
Observations from May 1957 to present?
100mm refractor.
Eyepiece projection method, 90mm image.
Drawings published monthly in: Solar Maps and Activity, Manila Observatory?
Rome, Italy
Observations from 1958 to present?
7,100+ drawings.
Drawing example.
Ref.
China.
Observations c.1965 to present?
200mm, refractor.
Observation method: ?
Drawings in observatory archives?
Drawing example.
Ref.
Boulder, Colorado, USA.
Observations from June 1965 to April 1994.
Between 8,000 to 9,000 drawings.
127mm f/15 refractor.
Observation method: Eyepiece projection to 18cm image.
Drawings in National Geophysical Data Center archives.
Drawing example.
Ref.
Philippines.
Observations from December 1965 to present?
15cm. f/17 refractor.
Eyepiece projection method, 20.3cm image.
Drawings in observatory archives?
Greece.
Observations from December 1965 to present?
100mm refractor.
Eyepiece projection method.
Drawings in National Observatory archives?
Slovakia, Hurbanovo, Slovak Republic.
Observations from June 1966 to present. Technical pause from December 1987 to April 1989.
6070+ drawings.
120 mm f/15 refractor; 150mm f/15 Coude refractor from December 1974 to present.
Observation method: eyepiece projection to 25cm image.
Drawings in observatory archives.
Drawing example.
Contact: Ladislav Pastorek.
Taiwan.
Observations from June 1967 to present?
Projection method.
Drawings observatory archives?
Mexico.
Observations from August of 1970 to 1983 - July 2, 1988 to September of 1999.
7,200 drawings.
60mm f/12 refractor and a Celestron C5 reflector.
Observation method: Eyepiece projection and TV monitor, image size 5cm and 18cm.
Drawings archived at the Sociedad Astronomica Orion, Nogales Sonora, Mexico and the Area de Astronomia/CIF-US, Universidad de Sonora, Hermosillo Sonora, Mexico.
Drawing example.
Contact: Antonio Sanchez-Ibarra.
United Kingdom - the south coast of England.
Observations from 1971 to present.
2,100+ drawings.
60mm refractor.
Observation method: Eyepiece projection drawn to 15.2cm circle.
Drawing archive personally owned and maintained, drawings are archived with Worthing Astronomical Society.
Drawing example.
Brian's interesting drawing arrangement: Telescope - Drawing box detail.
Contact: Brian Halls.
Netherlands
Observations from November 1976 to present.
5,000+ drawings.
90mm, f/14 refractor.
Observation method: Eyepiece projection to screen using an angle-prism, 15cm image.
Drawing archive personally owned and maintained.
Drawing example.
Mr. Van Slooten's Website.
England.
Observations from 1977-1985, 1990 to present.
2,500+ drawings.
80mm, f/11 refractor.
Observation method: Eyepiece projection drawn to 15.2cm circle.
Drawing archive personally owned and maintained.
Drawing example.
Mr. Meadow's excellent Website.
Zaragoza, Spain.
Observations from summer of 1983 to present.
3,800+ drawings.
Several telescopes used, currently a Zeiss 63mm f/13 refractor.
Observation method: Eyepiece projection drawn to 14cm circle, often with detailed drawings using his camara cónica obscura. (See references for a description.)
Drawing archive personally owned and maintained.
Drawing examples: Full disk - Detail - Fine detail- (very nice!)
Ref.
Wallisellen, Switzerland.
Observations 1984 to present.
3,000+ drawings.
Observation method: Eyepiece projection to 37 cm image, H-alpha drawings using Daystar 0.7Å filter
and photo negatives.
Drawing archive personally owned and maintained.
Drawing examples: Full disk - Detailed - Drawing key
Contact: Ivan Glitsch.Mr. Glitsch's Website.
Tokyo, Japan
Observations from March 26, 1986 to present.
2250+ drawings.
150mm f/15 refractor.
Observation method: Eyepiece projection to 20cm image.
Drawing archive personally owned and maintained.
Drawing example.
Contact: Fumio Hayashi.
Australia.
Observations from January 1988 to present.
3,500+ drawings.
152mm refractor stopped down to 51mm, (f/45.)
Observation method: Eyepiece projection, 18.2cm image.
Drawings are archived at the observatory in Narrabri, New South Wales.
Contact: Observatory staff.
Culgoora Solar Observatory Website.
Kysucke Nove Mesto, Slovakia.
Observations from January 1, 1991 to present.
2,400+ drawings.
200mm f/15 Ziess refractor.
Observation method: Eyepiece projection, 25 cm image.
Drawings are archived at the observatory.
Drawing example.
Contact: Jan Masiar.
Skultuna, Sweden.
Observations from 1991 to present.
1,000+ drawings.
100mm f/10 refractor.
Observation method: Eyepiece projection.
Drawing archive personally owned and maintained by Hans-Goran Lindberg.
Drawing example.
Observatory Website.
Bolivia.
Observations from 1991 and 1993 to present.
1,000+ drawings.
200mm refractor stopped down to 90mm.
Observation method: Barlow projection, 14cm image.
Drawing archive personally owned and maintained.
Drawing example.
Mr. Morales' Website.
Denmark.
Observations from March 26, 1991 to present.
96+ drawings.
16x50 binoculars and a Astro Travel 80 refractor.
Observation method: Direct, using attenuation at objective.
Drawing archive personally owned and maintained, sent to AAVSO.
Drawing examples: 1 - 2 - 3Brian's telescope.
Contact: Brian Nilsson.
United States.
Observations from January 1993 to present.
1,400+ drawings.
Various reflecting telescopes.
Observation method: Direct, using attenuation at objective or eyepiece.
Drawing archive personally owned and maintained.
Drawing example.
Mr. Carlson's Website.
Stockholm, Sweden.
Observations from 1993 to present.
450+ drawings.
60mm refractor f/15.
Observation methods: Eyepiece projection drawn to 8 cm circle from 1993 to 1998;
From 1999 to present, drawn to 14 cm circle and projection box.
Drawing archive personally owned and maintained.
Drawing examples: 1 - 2Jörgen's telescope.
Contact: Jörgen Blom.
Ogawa-village Astronomical Observatory, Japan.
Observations from August 1994 to August 1996 and 1999 to present.
276+ drawings.
150mm f/9 refractor.
Observation method: Eyepiece projection to 20cm image.
Drawings archived at the Ogawa Observatory.
Drawing example.View of observatory., view of telescope.
Contact: Yoshihito Sakai.
New Zealand.
Observations from September 23, 1994 to present.
477+ drawings.
110mm f/15 refractor.
Observation method: Eyepiece projection.
Drawing archive personally owned and maintained.
Drawing example.
Contact: Robert Evans.
Hong Kong, China
Observations from 1997 to present.
1,000+ drawings.
75mm refractor.
Observation method: Eyepiece projection.
Drawing archive owned and maintained by the club.
Drawing example.
Astronomy Club Website.
Erps-Kwerps, Belgium.
April, 1999 ongoing to present.
40+ drawings.
102mm f/6.5 Vixen apochromatic refractor.
Observation method: Direct viewing with AstroSolar filter and using ocular grid.
Drawings found at: Belgium Solar Observation Group
Her excellent drawing examples: 1 - 2 - 3
Oudenaarde, Belgium.
Observations from 25th August, 1999.
166+ full disk drawings, 51+ detailed.
140mm f/5.7 Neo Achromat refractor.
Observation method: Direct viewing using Herschel wedge and filter, eyepiece projection, direct projection.
Drawings personally owned and maintained.
Drawing examples: 1 - 2 - 3Gunther's telescope.
Gunther's Webpage.
Contact: Gunther Groenez.
Sydney, Australia.
December, 1999.
92+ drawings.
152mm f/10 Newtonian reflector.
Observation method: Direct viewing with objective filter, drawn onto a 94mm disk.
Drawings personally owned and maintained.
Drawing examples: 1 - 2 - 3 - 4Ben's telescope.
Contact: Ben Pawlutschenko.
Belgium.
April, 2000.
60+ drawings.
2000mm f/15 achromatic refractor.
Observation method: Eyepiece projection, direct projection; 480mm image.
Drawings found at: Belgium Solar Observation Group
Drawing examples: 1 - 2 - 3
150-Foot Solar Tower Home Page
Listing maintained by Larry S. Webster, who is solely responsible for its content.
Corrections and additions are encouraged!
Page last updated on January 30, 2001