Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Getting plate-solving status, please wait...
NGC 1499, the California Nebula, Ha [section], 





    
        

            Stephen Garretson
NGC 1499, the California Nebula, Ha [section]

NGC 1499, the California Nebula, Ha [section]

Technical card

Resolution: 2330x1735

Dates:Nov. 8, 2018Nov. 9, 2018

Frames:
Baader 3.5nm Ha filter, 2": 5x180" (gain: 139.00) -20C bin 1x1
Baader 3.5nm Ha filter, 2": 35x180" (gain: 139.00) 15C bin 1x1

Integration: 2.0 hours

Darks: ~22

Flats: ~30

Flat darks: ~15

Bias: ~44

Avg. Moon age: 1.32 days

Avg. Moon phase: 2.23%

Bortle Dark-Sky Scale: 6.00

Astrometry.net job: 2361359

RA center: 59.940 degrees

DEC center: 36.723 degrees

Pixel scale: 2.116 arcsec/pixel

Orientation: 267.804 degrees

Field radius: 0.854 degrees

Locations: Beevo Dome [home observatory], Louisville, CO, United States

Data source: Backyard

Description

This section of NGC 1499 centers on the star GSC 2369, 2206. I find it so interesting how getting in closer on some nebulae exposes structure, and this target is part of that exploration. [Using a centering star allows me to easily return to the same FOV to add data in subsequent sessions, as well as to slew to a bright focusing star as needed and then slew back to exactly where I was.] At present I monitor the temperature, and when has changed more than about 0.4° I check the focus with my Bahtinov mask. Having grown accustomed to this routine, I can genrally perform this check/adjustment in under two minutes, so a pretty simple and effective method of staying in focus. A new temperature compensating focuser is soon to be added, but that's for a different scope [8" CFRC].

This is only 2 hours of Ha at 3.5nm; as the target has low surface brightness I want to gather additional Ha data. Also, it's on a list of posible/probable targets that contain H-beta data, so I will experiment with that filter. I had just started a run of H-beta on 9, Nov. when the clouds slammed the door shut on the sky...so it goes...I'll be back.

Comments

Author

StephenGarretson
Stephen Garretson
License: None (All rights reserved)
230
Like

Sky plot

Sky plot

Histogram

NGC 1499, the California Nebula, Ha [section], 





    
        

            Stephen Garretson