Something that can surprisingly be acheived in Hong Kong -- a city with a serious light pollution issue.
Takahashi ϵ-180ED, FL500, f/2.8; QHY9 @-22°C; iOptron iEQ45 autoguided by QHY5 finder scope PHD.
Ha 800s X 6, G&B 200s X 4each (total 1.8hrs); Flat, Bias & bad pxiels calibrated, Ha enhanced HaGB, PixInsight, PS
Next photo of southern part of Auriga in colour this time.
Setup: Officina Stellare Veloce RH200, STL 11000 on EM-200.
Better quality in my gallery : www.astrofun.pl ( in English)
Pic du Midi d'Ossau over the lakes of Ayous http://www.astrosurf.com/lecureuil
Copyright: Patrick Lécureuil [attachment=4]pano_lac_ayous2.jpg[/attachment]
NGC 2244 in the Rosette Nebula http://www.astrobin.com/full/67024/0/
Copyright: Roberto Colombari and Federico Pelliccia [attachment=3]3973e6f9e979627751b02f9a61036a0b.1824x0_q100_watermark.jpg[/attachment]
Full Moon
Copyright: Ezequiel Etcheverry [attachment=2]Moon-1.jpg[/attachment]
Once a year, about 4 days before and after winter solstice, the sun aligns with Kitt Peak from a known pull-out on Mt. Lemmon in Tucson, Arizona. There is an uninterrupted view (aside from cars driving by) of the observatory to the SSW. I joined up with Tucson Amateur Astronomy Association (TAAA) to photograph the special event on Christmas Eve. Here is one of the photos I took. I converted it to black and white for better clarity.
Barnard 35 http://afesan.es
Copyright: Antonio F. Sanchez [attachment=1]B35,GN 05.42.06,LDN 1596, V FU Ori.jpg[/attachment]
Comet Siding Spring - C/2013 A1
Posted: Thu Dec 26, 2013 3:43 pm
by Efrain Morales
Comet Siding Spring - C/2013 A1. On December 22nd, 04:04-16ut. Now less then 10 months from now from its very close approach to Mars on October 19, 2014.
Jupiter, GRS, Oval Ba
Posted: Thu Dec 26, 2013 3:55 pm
by Efrain Morales
Jupiter, GRS, Oval Ba on 11/20/12. Re-processed of two of eight sets and a lapse time of one hour.
Re: Submissions: 2013 December
Posted: Thu Dec 26, 2013 4:00 pm
by Outters.Nicolas
NGC281 on Hubble palette http://outters.fr/NGC281-SHO-Rcos-U16-sirene.html
Copyright: Nicolas Outters/Didier Plassard
50 hours of exposure during last september at Castor Sirene observatory in France.
Cassiopeia, Polaris and Andromeda(M31) Connection Copyrights: Asim Patel
Re: Submissions: 2013 December
Posted: Thu Dec 26, 2013 9:47 pm
by xrtpow
X-Ray Sun Two-Month Mashup
This image is a sum of two months' worth of observations made by the X-Ray Telescope on the Hinode Satellite. Visit the XRT website for a full-size image, a movie of the composite coming together, and additional information.
Credit: SAO, NASA, JAXA, NAOJ, and Patrick McCauley
Re: Submissions: 2013 December
Posted: Fri Dec 27, 2013 5:48 am
by Seantos
Once a year, about 4 days before and after winter solstice, the sun aligns with Kitt Peak from a known pull-out on Mt. Lemmon in Tucson, Arizona. There is an uninterrupted view (aside from cars driving by) of the observatory to the SSW. I joined up with Tucson Amateur Astronomy Association (TAAA) to photograph the special event on Christmas Eve. Here is one of the photos I took. I converted it to black and white for better clarity.
This image shows Nova Centauri 2013, a bright naked eye nova in the Southern constellation of Centaurus. The nova was discovered by John Seach from Australia on 2 December 2013 when it was around magnitude 5.5. It subsequently brightened to reach a peak at magnitude 3.3. When this image was taken the nova had faded to around magnitude 4.5.
The nova is the result of a thermonuclear explosion on the surface of a white dwarf star in a tight binary system. The white dwarf accretes matter from its nearby companion and eventually the pressure from nuclear fusion blows off the accreted layers from the surface of the white dwarf. Contrary to a supernova where the star itself is blown apart and ceases to exist, a nova does not result in the destruction of the host star. The white dwarf may continue to accrete matter from its companion and the process may repeat itself some time in the future.
The nova appears pink because we are really viewing the light from an expanding shell of ionised hydrogen which emits strongly in both the red and blue part of the optical spectrum. These emmissions give the nova its strong pinkish colour, similar to emmision nebulae which are also predominantly pink/magenta in hue.
Image details:
Date: 28th Dec 2013
Exposure: LRGB: 17:7:6:6 mins, total 36 mins @ -25C
Telescope: 12.5" f/4 Serrurier Truss Newtonian
Camera: QSI 683wsg with Lodestar guider
Filters: Astrodon LRGB E-Series Gen 2
Taken from my observatory in Auckland, New Zealand
Re: Submissions: 2013 December
Posted: Fri Dec 27, 2013 2:52 pm
by owlice
M45
Copyright: Viktor Linnik and Alexander Radionov [attachment=2]M_45.jpg[/attachment]
IC 405 Wide Field
Copyright: Albert Barr [attachment=1]IC405wide_hubble.jpg[/attachment]
Aurora borealis on Christmas morning in Denali National Park, Alaska
Copyright: Travis Hall [attachment=0]DSC_5044.jpeg[/attachment]
in colour this time.
