Similarly, many a young man, hearing for the first time of the refraction of stellar light, has thought that doubt was cast on the whole of astronomy, whereas nothing is required but an easily effected and unimportant correction to put everything right again.
/ Ernst Mach /



In memoriam Halton C. Arp (1927-2013).


My astronomy sketches. Hover mouse over image for the inverted look. For fainter objects, take a look at the black-on-white original, sometimes it reveals more details.


Need advice? Want to discuss an observation? Feel free to contact me at flovro gmail*com.

ÚJ! Amennyiben elérhető, a ikonra kattintva magyarul is olvashatod az észlelést.


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Mu UMa (TVICS)
Also known as: Mu Ursae Majoris, Tania Australis
Right ascension: 10h 23m Declination: 41° 26'
Constellation: Ursa Major
Date/time: 2014.05.23 21:00 UT
Equipment: 12" f/5 Newtonian
FoV: 12' Magnification and filter(s): 250x
Seeing: 7/10 Transparency: 3/5
SQM: 21.14 m/as2 Temperature: 14°C
Humidity: low Wind: none
Sight: 4 - lots of details, very interesting, unique look
Difficulty: 1 - instantly visible, no dark adaptation or averted vision needed
Position: 1 - very easy, many bright stars nearby
Location: Nádasdladány, Hungary
Observer: Ferenc Lovró
Description:

Interesting, but Mu UMa was in front of me all these years, yet I've never noticed its fantastic colour. It responds to changing magnifications in a very interesting way, and this seem to support my theory that you can see stellar colours much easier with a non-dark adapted eye: with naked eye it's orange, at 71x it is golden, and at 250x it's white. The sketch displays the hue at 71x.


Hi-resolution image: [ reversed sketch | original sketch ]
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All text and images are ©opyright of Ferenc Lovró. All rights reserved worldwide.

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