Deep-Sky Wonders: The Jewels of Spring

March 10, 2019 - Comment

The colours of stars are sometimes in comparison with these of treasured gem stones, with the best stars as our rubies and the most popular as sapphires. However how crimson or blue do they actually look? The Seventh-magnitude blue sapphire HIP 52849 shines within the constellation Leo Minor.POSS II / CalTech / STScI / Palomar


The colours of stars are sometimes in comparison with these of treasured gem stones, with the best stars as our rubies and the most popular as sapphires. However how crimson or blue do they actually look?

The Seventh-magnitude blue sapphire HIP 52849 shines within the constellation Leo Minor.
POSS II / CalTech / STScI / Palomar Observatory

Within the Might 2019 subject, Sky & Telescope Contributing Editor Sue French affords a have a look at among the season’s most colourful stars, beginning with the resplendent crimson carbon star V Hydrae and ending with the good blue subdwarf HIP 81145.

Beneath you may discover a desk that features the colour indices (very crimson stars have optimistic numbers, blue stars have detrimental) in addition to the positions (RA and Dec.) for the celebrities mentioned within the Might Deep-Sky Wonders column.

The crimson stars listed below are all variable stars. Although perceptibly crimson or orange, the depth of a variable star’s coloration modifications because the star strikes by means of its cycle (the dimmer the star, the redder it appears). In case you get hooked on the romance of crimson, you’ll want to take a look at our carbon star observing guides right here and right here.

 

Jewels of Spring

Object
B – V
RA
Dec.
V Hydrae
5.5
10h 51.6m
–21° 15′
SS Virginis
four.2
12h 25.2m
+00° 46′
RY Draconis
three.three
12h 56.4m
+66° 00′
T Lyrae
5.5
18h 32.3m
+37° 00′
HIP 40047
–zero.30
8h 10.8m
+74° 58′
HIP 52849
–zero.23
10h 48.4m
+37° 34′
HIP 55051
–zero.21
11h 16.2m
–three° 28′
Spica
–zero.24
13h 25.2m
–11° 10′
HIP 81145
–zero.28
16h 34.4m
–four° 01′

B – V knowledge are from latest catalogs. Proper ascension and declination are for equinox 2000.zero.

CATEGORIES
Past the Printed Web page

JR

About JR

S. N. Johnson-Roehr is an Affiliate Editor at Sky & Telescope. She favors Vega and the Double Double.



Supply hyperlink

Comments

Comments are disabled for this post.