Altair

Tiny points of light, with a magic all their own.
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Christopher K.
Posts: 5474
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Altair

Post by Christopher K. »

In addition to being the second-brightest of the apexes of the Summer Triangle, it's a beautiful sight in its own right. I looked at it last night through one of HRPO's 10x Bushnells. All of these old friends like Altair seem fresh now that the close flyby of Pluto occurred.

Below are the times during which Altair reaches its Baton Rouge culmination of sixty-nine degrees...
30 May = 4:26am
3 June = 4:10am
7 June = 3:54am
11 June = 3:38am
15 June = 3:23am
19 June = 3:07am
23 June = 2:51am
27 June = 2:35am
1 July = 2:20am
5 July = 2:04am
9 July = 1:48am
13 July = 1:33am
17 July = 1:17am
21 July = 1:01am
25 July = 12:45am
29 July = 12:30am
2 August = 12:14am
6 August = 11:54pm
10 August = 11:38pm
14 August = 11:23pm
18 August = 11:07pm
22 August = 10:51pm
26 August = 10:36pm
30 August = 10:20pm
3 September = 10:04pm
7 September = 9:48pm
11 September = 9:33pm
15 September = 9:17pm
19 September = 9:01pm
23 September = 8:45pm
27 September = 8:30pm
1 October = 8:14pm
All times are Daylight.

Christopher K.
Posts: 5474
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: Altair

Post by Christopher K. »

Around 9:30pm tonight I went onto HRPO's front viewing pad and gave the environs of Altair an unaided-eye test. Mag 2.7 Tarazed was very easy. Mag 3.2 Theta Aquilae and mag 3.3 Delta Aquilae were easy. After a few seconds of dark-adaption (and cupping my eyes) I spotted mag 3.7 Beta Aquilae and mag 3.8 Eta Aquilae. I'm asking that any other BRAS members perform this same test from home between now and Friday night.

Christopher K.
Posts: 5474
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: Altair

Post by Christopher K. »

On 15 October at ~9:30pm I went outside and noticed we were losing the Summer Triangle. It was already completely in the western half of the sky. Tonight at 9:30pm I wonder if it can be seen in its entirety...

Christopher K.
Posts: 5474
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: Altair

Post by Christopher K. »

With a clear eastern horizon one can see the beautiful Altair rising early Monday morning at about 12:15am. (It won't be until 1:30am however when the dimmer Tarazed, very close to Altair, can be spotted easily.)

Altair spins at a extremely rapid 210 kilometers per second. We see it at it appeared in about September 2003...
http://stars.astro.illinois.edu/Sow/altair.html

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