# wiu6thesupernovaof1885

- Page ID
- 290630

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Data

Step

Item

Value

1

Angular Size

?? arc sec

2

Expansion Rate

?? km/s

3

Physical Size

?? lightyear

4

Distance

?? lightyear

Introduction

Steps:

- Use the image to measure the angular size of the remnant.
- Use the spectrum to estimate the expansion velocity of the cloud.
- Use the age of the remnant and its expansion velocity to determine the physical size of the cloud.
- Use the small angle formula to determine a distancr from the angulat size and physical size.

Measure Angular Size of SN

Calculation

Diameter (Pixels)

×0.049 arc sec/pixel =

?? arc sec

Measure Expansion Rate of SN

FWHM: 105.72

Line 1

Line 2

Line 1

×c =

?? km/s

Line 2

- 35×c =

?? km/s

Average Velocity

?? km/s

Calculate Physical Size of SN

Age of Supernova

Years: 1998 - 1885 =years

Seconds:

60 s

min

×

60 min

hr

×

24 hr

day

×

365 day

year

×

years =

0. seconds

Size of Supernova

Km :

0. seconds × ?? km/s

?? km

Ly :

?? km * 1.05e-13 ly/km=

?? ly

Distance to SN

Convert Angular Size to Radians

0

arcsec ×4.85e-6 rad/arcsec =

?? rads

Calculate Distance

?? ly

rads

=

?? ly

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