2024JAVSO..52..146M

Query : 2024JAVSO..52..146M

2024JAVSO..52..146M - J. Am. Assoc. Variable star obs., 52, 146 (2024)

A Photometric Study of the Total Eclipsing Algol Binary KK Draconis.

MICHAELS E.J.

Abstract (from CDS):

Multi-band light curves of the eclipsing binary star KK Draconis are presented. The primary eclipse is total with a depth of 3.1 magnitudes in the Johnson B passband. A simultaneous five-color light curve solution was obtained using the Wilson-Devinney program. The solution results describe a semidetached configuration with a mass ratio of M2/ M1 = 0.50, an orbital inclination of i = 88.4 degrees, and a temperature difference of Delta T = 2074 K between the component stars. Asymmetries in the light curves were modeled with cool spots located on the K7 secondary star. New linear and quadratic ephemerides were computed, giving an orbital period of 1.192834 d which is decreasing at a rate of -3.941 x 10^-7 d yr^-1.

Abstract Copyright: ∼

Journal keyword(s):

Status at CDS : Objects in title, abstract, text, figures, and all or part of small table(s) being processed in SIMBAD.

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	V* KK Dra	EB*	19 07 56.6642286360	+59 23 52.064796336		13.41	12.79	12.126		~	25	0

Query : 2024JAVSO..52..146M

Basic data :

V* KK Dra -- Eclipsing Binary

* (TYC,GSC,...), V* (LD,1SWASP,...), EB? (2017ARep), EB* (2015A&A), NIR (2MASS), Opt (ATO)

19 07 56.6642286360 +59 23 52.064796336 (Optical) [ 0.0097 0.0101 90 ] A 2020yCat.1350....0G

19 07 10.7322027239 +59 19 01.269030623 [ 0.0097 0.0101 90 ]

089.9607979519259 +21.0923448538336 [ 0.0097 0.0101 90 ]

8.253 -7.404 [0.012 0.013 90] A 2020yCat.1350....0G

1.6795 [0.0102] A 2020yCat.1350....0G

B 13.41 [0.36] D 2000A&A...355L..27H

V 12.79 [0.26] D 2000A&A...355L..27H

R 12.126 [0.05] D 2012yCat.1322....0Z

G 12.115191 [0.004148] C 2020yCat.1350....0G

J 11.402 [0.027] C 2003yCat.2246....0C

H 10.984 [0.028] C 2003yCat.2246....0C

K 10.893 [0.022] C 2003yCat.2246....0C

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`TYC 3932-152-1`	`LD 282`	`TIC 377307592`	`Gaia DR2 2155552418378050304`
`ATO J286.9861+59.3977`	`2MASS J19075666+5923520`	`UCAC4 747-055599`	`Gaia DR3 2155552418378050304`
`GSC 03932-00152`	`1SWASP J190756.71+592351.9`	*`V KK Dra`**	`Gaia DR1 2155552414080457088`

References (25 between 1850 and 2026) (Total 25)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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`TYC 3932-152-1`	`GSC 03932-00152`	`2MASS J19075666+5923520`	`UCAC4 747-055599`	*`V KK Dra`**
`Gaia DR2 2155552418378050304`	`Gaia DR3 2155552418378050304`	`Gaia DR1 2155552414080457088`

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