Question

Using Stellarium or SIMBAD, find the star Diphda. Which value is closest to its B-band magnitude?

		2.00
		3.01
		1.01
		–0.35
		0.99
		–0.99

Answer 1

Details of Diphda using Stellarium

Diphda (Deneb Kaitos)
β Cet - 16 Cet - HIP 3419 - SAO 147420 - HD 4128 - HR 188
Type: star
Magnitude: 2.00 (extincted to: 6.18)
Absolute Magnitude: -0.35
Color Index (B-V): 1.01
RA/Dec (J2000.0): 0h43m35.54s/-17°59'11.2"
RA/Dec (on date): 0h44m30.53s/-17°53'10.0"
HA/Dec: 4h58m01.76s/-17°33'59.9" (apparent)
Az./Alt.: +246°44'39.8"/+0°26'21.1" (apparent)
Gal. long./lat.: +111°20'03.8"/-80°40'51.7"
Supergal. long./lat.: -81°37'40.1"/-2°10'36.7"
Ecl. long./lat. (J2000.0): +2°35'03.2"/-20°47'01.2"
Ecl. long./lat. (on date): +2°50'32.7"/-20°47'00.1"
Ecliptic obliquity (on date): +23°26'07.1"
Mean Sidereal Time: 5h44m4.1s
Apparent Sidereal Time: 5h44m3.3s
IAU Constellation: Cet
Distance: 96.32 ly
Spectral Type: G9II-III
Parallax: 0.03386"
Proper motions by axes: 244.8 34.6 (mas/yr)
Position angle of the proper motion: 82.0°
Angular speed of the proper motion: 247.2 (mas/yr)

B-band magnitude is -0.35