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Rosette Ha mosaic 6 sessions

2020-03-05T19:40:33+00:005 March 2020|Narrowband, Nebula, News, NGC Winter|

Still a work in progress. APP is great for doing these sorts of mosaics.
5000 pixel size reduced to 2000 for this.

Object IDNGC2244/2237
Rosette Nebula
Monoceros
Details6 sessions over Jan – March 2020
Telescope250mm f4.8 Newtonian
CameraAtik 460EX
Baader 7nm Ha filter
Exposure(s)Nominally 6 x 15 x 300s
but probably fewer since some will be discarded
CaptureAPT
ProcessingAPP, Photoshop

M51 with synth G

2020-02-23T12:44:17+00:0023 February 2020|Galaxy, News|

Green channel was very noisy with horrible LP gradients in it so synthesised G from R + B. Still noisy though.

Object IDM51 Whirlpool Galaxy
DetailsRed channel 2020-02-15
Blue channel 2020-02-18
Telescope250mm f4.8 OO Newtonian
CameraAtik 460EX@15C
Baader RGB
Exposure(s)15x180s ea RB
darks, flats, bias
CaptureAPT
ProcessingSIRIL (first time)
Photoshop

Exoplanet observation by imagination

2020-01-21T20:38:03+00:0021 January 2020|Exoplanet, News|

How do you observe Exoplanets when it’s cloudy? By imagination. I’m not an artist but I can use Photoshop, so here’s an Exoplanet “observation” by imagination. Just a bit of fun – and really not to scale – that would be boring!

FORTH-1b is the one closest to the star, far too hot for water and life, but FORTH-1c is in the Goldilocks zone, is about 1.2 times the Earth’s diameter and has a satellite. There are 2 gas giants further out.

Heart of the Rosette NGC2244

2020-02-06T17:57:40+00:006 February 2020|HOYS, Nebula, News|

Data taken for the HOYS project of NGC2244 in Hydrogen-Alpha. This was taken in strong moonlight but Ha images are much less affected. RGB was a non-starter with the Moon so strong.

Object IDNGC2244 Rosette Nebula HOYS 008
Details2020-02-04
22:48:47 – 23:36:01
Telescope250mm f4.8 Newtonian
CameraAtik 460EX @15C
Exposure(s)10x300s Baader Ha
bin 1×1, darks, flats, bias
CaptureAPT
ProcessingNebulosity, Photoshop

Supernova SN 2020ue in NGC 4636

2020-01-19T20:57:00+00:0019 January 2020|Galaxy, News, Other|

Object IDSN 2020ue
NGC 4636
Details2020-01-19 01:12:57 UT
Muniwin gives mag. as 12.56
RA = 12 42 47
DEC = +2 39 35
FWHM = 2.77 pxl
Sky = 1708.31 ADU
Sky dev. = 50.19 ADU
Net intensity = 94384.6 ADU
Noise = 271.5 ADU
S/N ratio = -25.4 dB
Brightness = 12.5627 mag
Error = 0.0031 mag
Telescope250mm f4.8 OO Newtonian
CameraAtik 460EX @-15C
Exposure(s)5x120s 2×2 TR
CaptureAPT
ProcessingNebulosity, Muniwin

WASP-36b

2020-01-28T19:01:56+00:0021 January 2020|Exoplanet, News|

Second observation submitted to ExoClock project. Not such good data

Object IDWASP-36b
ExoPlanet, Hydra
Details2020-01-18 21:56:26 UT
Telescope250mm f4.8 OO Newtonian
CameraAtik 460EX @-15C
Exposure(s)58x180s 2×2 TR
CaptureAPT
ProcessingHOlomon Photmetric software

WASP-104b

2020-02-15T13:49:29+00:0015 February 2020|Exoplanet, News|

Submitted to ExoClock project.

Object IDWASP-104b
ExoPlanet, Leo
Details2020-02-06 22:11:27 UT
Telescope250mm f4.8 OO Newtonian
CameraAtik 460EX @-15C
Exposure(s)237x50s 2×2 TR
CaptureAPT
ProcessingHOlomon Photmetric software

This fitting uses points with less scatter and is clearer to see.

WASP-43b

2020-01-28T18:26:00+00:0019 January 2020|Exoplanet, News|

First observation submitted to ExoClock project.

Object IDWASP-43b
ExoPlanet, Sextans
Details2020-01-18 00:10:30 UT
Telescope250mm f4.8 OO Newtonian
CameraAtik 460EX @-15C
Exposure(s)62x120s 2×2 TR
CaptureAPT
ProcessingHOlomon Photmetric software

Exoplanet X0-2 b

2020-01-28T19:33:49+00:007 January 2020|Exoplanet, News|

Second attempt at an exoplanet. Dips in light curve caused by a moving dark patch in light train – possibly dust or condensation. Would be better data if not for that. Also target is over-saturated again.

Object IDQatar-1 b
Details2019-12-30 20:58:17 – 00:32:05 UT
Lynx
RA (J2000): 07 48 07, DE (J2000): +50 13 33,
V = 11.18 mag, dV = 0.0124 mag, duration = 162 minutes
Telescope250mm f4.8 Newtonian
CameraAtik 460EX -15C
Exposure(s)216x50s TR 2×2 (probably oversaturated)
darks, flats, bias
CaptureAPT
ProcessingNebulosity, AstroImageJ
Exoplanet Transit Database
http://var2.astro.cz/ETD/etd.php?STARNAME=XO-2&PLANET=b

JD mid:
HJD mid: (helcor = 0.00491)
Duration: minutes
Depth: mag

Qatar-1 b First Exoplanet

2020-01-28T19:34:32+00:007 January 2020|Exoplanet, News|

Been on my list to detect exoplanets for ages and finally got around to doing it. The data is messy and needs to be improved but it does fit the transit. Target star is over-saturated so never going to be good.

Top line shows curve before detrending – probably due to airmass changes. Quite serious clarity variations during session.

Object IDQatar-1 b
DetailsDraconis
2019-12-13 18:56:34 – 20:54:59 UT
RA (J2000): 20 13 32, DE (J2000): +65 09 43 ,
V = 12.84 mag, dV = 0.0204 mag, duration = 96.7 minutes
Telescope250mm f4.8 Newtonian
CameraAtik 460EX -15C
Exposure(s)58x120s TR 2×2 (probably oversaturated)
darks, flats, bias
CaptureAPT
ProcessingNebulosity, AstroImageJ
Exoplanet Transit Database
http://var2.astro.cz/ETD/predict_detail.php?STARNAME=Qatar-1&PLANET=b&PER=&M=

Qatar-1 b transit_FIT_plotter_residuals

JD mid:
HJD mid: (helcor = 0.00041)
Duration: minutes
Depth: mag

IC349 Barnard’s Merope Nebula

2020-01-07T17:25:55+00:007 January 2020|Nebula, News, NGC Winter|

Thought I’d try and get the Merope Nebula as the whole Pleiades don’t fit in my FOV. But saw a flaw beneath Merope which turned out to be another nebula.

Object IDIC349 Barnard’s Merope Nebula
DetailsSize 0.5′, Mag. 13
Taurus
Telescope250mm f4.8 Newtonian
CameraAtik 460EX -15C
Exposure(s)3x180s ea RGB 1×1
darks, flats, bias
CaptureAPT
ProcessingAPP, Photoshop

NGC 2024 Flame Nebula RGB

2019-12-05T16:10:37+00:005 December 2019|Nebula, News, NGC Winter|

Wasn’t expecting it to be clear so this is a bonus. Only managed 5 of each colour though so quite noisy and Alnitak overpowers eveything.

Object IDNGC 2024 Flame Nebula
DetailsSize 30’x30′, Mag. 10
Orion
Telescope250mm f4.8 Newtonian
CameraAtik 460EX -15C
Exposure(s)5x180s ea RGB 1×1
darks, flats, bias
CaptureAPT
ProcessingAPP, Photoshop

M92 RGB

2019-12-05T16:06:47+00:005 December 2019|Globular Cluster, News, NGC Summer|

Because sky conditions were very poor I went back to globulars as nebulosity can easily disappear in LP and fog. APP got rid of the massive gradients and LP quite well I think.

Object IDM92 (NGC6341)
DetailsSize 14′, Mag. 6.3
Hercules
Telescope250mm f4.8 Newtonian
CameraAtik 460EX -15C
Exposure(s)10x180s ea RGB 1×1
darks, flats, bias
CaptureAPT
ProcessingAPP, Photoshop

Fish head nebula (IC1795)

2019-12-05T16:01:34+00:005 December 2019|Nebula, News, NGC Autumn|

This is a bit of a weird looking one! Stars to the left aren’t good shapes – probably combination of optical alignment, focus and collimation. Stars are over-processed too – should have been so much better.

Object IDIC1695 Fish head nebula (part of the Heart nebula)
DetailsSize 12’x12′
Cassiopeia
Telescope250mm f4.8 Newtonian
CameraAtik 460EX -15C
Exposure(s)20x300s ea Ha, OIII 2×2
darks, flats, bias
CaptureAPT
ProcessingAPP, Photoshop
Processed SHO with synthetic SII

Cygnus Wall NGC 700 (Caldwell 20)

2019-09-21T16:27:20+00:0021 September 2019|Caldwell, Narrowband, Nebula, News, NGC Summer|

Part of the North America nebula – the Central America part – seems to be known as the Cygnus Wall. Can only fit a small part of this object in my FOV.

Object IDNGC 7000, C20
DetailsMag. 4
Size: 120′ x 100′
Telescope250mm f4.8 Newtonian
CameraAtik 460EX, Baader filters
-15C
Exposure(s)10x300s ea in Ha and OIII
CaptureAPT
ProcessingAPP, Photoshop
Mapped HOO and moved to the blue end