Warning: include(/home/content/s/n/a/snaevarr/html/templates/system/file.php) [function.include]: failed to open stream: No such file or directory in /home/content/06/3660306/html/index.php on line 9

Warning: include() [function.include]: Failed opening '/home/content/s/n/a/snaevarr/html/templates/system/file.php' for inclusion (include_path='.:/usr/local/php5/lib/php') in /home/content/06/3660306/html/index.php on line 9

Warning: include(/home/content/s/n/a/snaevarr/html/myndasafn/themes/slider/system.php) [function.include]: failed to open stream: No such file or directory in /home/content/06/3660306/html/index.php on line 12

Warning: include() [function.include]: Failed opening '/home/content/s/n/a/snaevarr/html/myndasafn/themes/slider/system.php' for inclusion (include_path='.:/usr/local/php5/lib/php') in /home/content/06/3660306/html/index.php on line 12

Warning: include(/home/content/s/n/a/snaevarr/html/myndasafn/g2data/locale/diff.php) [function.include]: failed to open stream: No such file or directory in /home/content/06/3660306/html/index.php on line 15

Warning: include() [function.include]: Failed opening '/home/content/s/n/a/snaevarr/html/myndasafn/g2data/locale/diff.php' for inclusion (include_path='.:/usr/local/php5/lib/php') in /home/content/06/3660306/html/index.php on line 15

Warning: include(/home/content/s/n/a/snaevarr/html/plugins/content/file.php) [function.include]: failed to open stream: No such file or directory in /home/content/06/3660306/html/index.php on line 18

Warning: include() [function.include]: Failed opening '/home/content/s/n/a/snaevarr/html/plugins/content/file.php' for inclusion (include_path='.:/usr/local/php5/lib/php') in /home/content/06/3660306/html/index.php on line 18

Warning: include(/home/content/s/n/a/snaevarr/html/modules/mod_random_image/tmpl/system.php) [function.include]: failed to open stream: No such file or directory in /home/content/06/3660306/html/index.php on line 21

Warning: include() [function.include]: Failed opening '/home/content/s/n/a/snaevarr/html/modules/mod_random_image/tmpl/system.php' for inclusion (include_path='.:/usr/local/php5/lib/php') in /home/content/06/3660306/html/index.php on line 21

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/content/06/3660306/html/index.php:9) in /home/content/06/3660306/html/libraries/joomla/session/session.php on line 423

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/content/06/3660306/html/index.php:9) in /home/content/06/3660306/html/libraries/joomla/session/session.php on line 423

Warning: Cannot modify header information - headers already sent by (output started at /home/content/06/3660306/html/index.php:9) in /home/content/06/3660306/html/libraries/joomla/session/session.php on line 426
2007 Myrkvatvístirnið RZ COM
Home Stjörnuathuganir 2007 Myrkvatvístirnið RZ COM
2007 Myrkvatvístirnið RZ COM Skoða sem PDF skjal Prenta út Senda hlekk á þessa síðu til vinar
Skrifað af: Snævarr   
Fimmtudagur, 15. Janúar 2009 21:33

Í stjörnumerkinu Bereníkuhaddi er myrkvatvístirnið RZ Coma Berenices (RZ COM) sem er af svonefndri gerð W UMa (sjá grein hér). Aðfaranótt 30. mars 2008 fylgdist ég með myrkva hennar en ljósdeyfingin er 0,7 birtustig. Fylgst var með myrkvanum á bæði B og V borða. Ljóssíurnar eru Johnson gerð. Sömuleiðis var haft viðmið af stjörnunum 23 Comae Berenices (birtustig 4,78) og TYC 1990-3280-1 (birtustig 8,68) til frekari ákvörðunar á sýndarbirtustigi.

 

RZ COM
 Tegund: EW/KW
Stöðuhnit 12:35'05  +23° 20' 14"
Birtustig (V)
 10,42 - 11,12
Birtulota 0,338506332 (8,12 klst)
P myrkvi
 0,7 birtustig
S myrkvi
 0,7 birtustig
B-V 0,57

 

Hér fyrir neðan má sjá ferilrit fyrir B og V borða. Mælistök eru í birtustigi tækis (instrumental  magnitude) og eru bláir punktar fyrir B og grænir fyrir V. Birtustig tækis er á y-ás og tíðni mælinga eru á x-ás. Ástæðan fyrir því að þar er ekki tímakvarði er sú að enn á eftir að setja inn "Julian Date" á myndina. Fyrsti mælipunktur er JD 2454555.43834 og síðasti JD 2454555.61991. Við blasir talsverð dreifing mælistaka í báðum filterum. Má vera að það sé vegna áhrifa norðurljósa. Þetta kvöld var stilla og hitastig breytilegt frá um -5,6°C kl 22:53 til -6,9°C kl 03:00. Mest frost var um kl 01:00 eða -7,5°C. Móðukennd norðurljósaslikja var í lofti en bent er á að það geti haft áhrif á mælingar.

 

RZ COM

Heimildir:

Kreiner, J.M.,Kim C-H. og Nha, I-S.(2009). Atlas of O-C Diagrams of Eclipsing Binary Stars. Skoðað 14. janúar 2009 á http://www.as.up.krakow.pl

Kreiner, J.M. (2004). Acta Astronomica. Vol. 54. Bls 207 - 210. 

Rovithis, P. og Rovithis-Livaniou, E.(1984). Photoelectric observations and minima times for RZ Comae Berenices. Astronomy and Astrophysics. Supplement serie 58, bls 679 - 684. Skoðað 15. janúar 2009 á http://articles.adsabs.harvard.edu

 

Síðast uppfært: Sunnudagur, 25. Janúar 2009 21:41
 

Valid XHTML and CSS.