IOAA 2012, Наблюдения, втора нощ, английски — Задача 3
IOAA´s 2012 2nd try Observational Exam
Внимание: Бележка към темата
Star charts 4–6 are supplied from the corresponding Bulgarian observational packet. Its filename is English, but its task sheet and captions are Bulgarian. The original English text-only edition and its inline key are retained: task2 gives only a)1.5 and b)0.5 without explaining these values; no missing drawing is invented. The time limits differ between the English and Bulgarian packets, so the English inline key governs this edition.
Условие
Point your telescope to the star SAO 209318 (star chart-5). Notice a small nebulous patch close to that star. Use your 10mm or 10mm + 2x barlow to estimate the distance between the star and the nebulous patch, in arc minutes. (coordinates to SAO 209318 are : 17h50m51s and : -37°02’). Express your answer using 0.5’ precision knowing that the field of view of the 10mm eyepiece on this telescope is 24 arcmin or 0.4º. If you are not able to point at the star, the instructor will do it for you but you lose 50% of the points. (2 min pointing, 3 min determining the distance)
Отговори
4.5 arcmin
Official key: ~ 4.5’ (4’18”); 4 to 5 arc minutes count as 100% correct, 3.0 – 3.9 or 5.1 – 6.0 arc minutes as 70% correct.
Решение
R: ~ 4.5’ (4’18”). 4 to 5 arc minutes will be considered 100% correct answers. 3.0 – 3.9 or 5.1 – 6.0 arc minutes will be considered 70% correct. (5 minutes)
Оригинал в Архива: ObservationalNight2text.doc · допълнителни данни: ObservationalNight2.docx