F-Class Stars “Oh, be a fine girl, kiss me right now.” The aforementioned is the easy mnemonic by which to remember spectral classes. (The first letter in each word is a spectral class; therefore, fine represents F- Class stars.) F-Class stars are yellow-white. These stars are hotter than Earth’s sun. The temperature of these stars are 6,000-7,500 K. Further divisions are 0-9 (hotter to cooler) and I-V (luminosity, supergiants to dwarfs). F-Class stars can be 0 (hypergiants), I (supergiants), II (bright giants), III (normal giants), IV (subgiants), V (main sequence) and VI (subdwarfs). This slide shows lists 24, F-Class stars.

DWARF in the BULL CONSTELLATION In the constellation of Taurus the Bull, Alcyone ( η Tauri) is a dwarf star.  Spectral Class: F  Distance: 370 ly  Abs. Magnitude: ?

DRAGON BINARY In the constellation of Draco the Dragon, Alrakis ( μ Draconis) is one of many binary, star systems.  Spectral Class: F7V  Distance: 88 ly  Abs. Magnitude: ?  Binary

CROWNING STAR Berenices Hair constellation (Coma Berenices) has the crowning star Diadem ( ά Comae Berenices).  Spectral Class: F5V  Distance: 63 ly  Abs. Magnitude: ?  Binary

ANOTHER DRAGON BINARY Dziban ( ψ Draconis) is another binary star system in the Draco the Dragon Constellation.  Spectral Class: F5IV-V/F8V  Distance: ly  Abs. Magnitude: ?

FLYING HORSE BINARY In Pegasus the Flying Horse Constellation, there is a binary, star system. This particular one is Matar ( η 2 Pegasi).  Spectral Class: F0V  Distance: 167 ly  Abs. Magnitude: -1.18

VIRGIN HAS A VARIABLE Virgo is the Virgin Constellation. Porrima ( γ Virginis) is one, variable star.  Spectral Class: F0V  Distance: 38.1 ly  Abs. Magnitude: 2.38

A NOTABLE, LITTLE DOG Procyon ( ά Canis Minoris) is the notable, little dog (canine) in the Canis Minoris Constellation.  Spectral Class: F5IV  Distance: ly  Abs. Magnitude: 2.65

A DOLPHIN BINARY Rotanev is in Delphinus the Dolphin Constellation. This star is β Delphini B, a binary, star system.  Spectral Class: F5IV  Distance: 101 ly  Abs. Magnitude: 2.79

LITTLE BIT of the SWAN Cygnus the Swan Constellation is one of the largest constellations. Sadr ( γ Cygni) is a little bit of this constellation.  Spectral Class: F8  Distance: 1,800 ly  Abs. Magnitude: -6.12

SUPERGIANT with the BIG DOG Canis Majoris is the Major Dog Constellation. Wesen ( δ Canis Majoris) is a notable, supergiant star in this constellation.  Spectral Class: F8  Distance: 1,600 ly  Abs. Magnitude: -6.86

METAL RICH STAR in VIRGO Zavijava is a metal rich star in Virgo the Virgin Constellation. This star’s designation is β Virginis.  Spectral Class: F9V  Distance: ly  Abs. Magnitude: 3.41

QUEEN and her DWARF Cassiopeia the Queen Constellation has a dwarf star. This is ι Cassiopeiae B.  Spectral Class: F5V  Distance: ly  Abs. Magnitude: ?

BINARY with the COMPASSES Circinus is the Pair of Compasses Constellation. One, binary system is δ Circini.  Spectral Class: F8  Distance: ?  Abs. Magnitude: ?

BINARY with the HORSE Equuleus is the Little Horse Constellation. A binary system in this constellation is δ Equulei.  Spectral Class: F5V  Distance: 60.3  Abs. Magnitude: 3.142

A BINARY in the FURNACE Fornax is the Chemical Furnace Constellation. One, binary system in this constellation is α Fornacis.  Spectral Class: F8  Distance: 40  Abs. Magnitude: 3.86

A LITTLE BIT of HERCULES An F-Class star in Hercules the Hero Constellation is χ Herculis.  Spectral Class: F8-9V  Distance: 51.7  Abs. Magnitude: ?

HARE GETS a SUPERGIANT Lepus the Hare Constellation has a supergiant. This star is α Leporis.  Spectral Class: F0Ib  Distance: 2,200 ly  Abs. Magnitude:

DOUBLE STAR on the SCALES Libra is the Scales Constellation. One of the double stars in this constellation is α Librae 2.  Spectral Class: ?  Distance: 75.8 ly  Abs. Magnitude: 0.88

BINARY on the SCALES Libra is the Scales Constellation. One of the star systems that is a binary system is η Librae 2.  Spectral Class: F0IV  Distance: 149 ly  Abs. Magnitude: ?

NORTHERN COMPONENT with the LYRE Lyra is the Lyre Constellation. The northern star ( ε Lyrae 1 ) is the F-Class star.  Spectral Class: F1V  Distance: 162 ly  Abs. Magnitude: ?

BINARY in a TRIANGLE The constellation list has two Triangulums. This is Triangulum, (The other is Triangulum Australe.) Alpha ( α 1 Trianguli ) is one of a binary.  Spectral Class: F5III  Distance: 63.3 ly  Abs. Magnitude: 1.98

DOUBLE STAR in a TRIANGLE Triangulum Australe is the Southern Triangle Constellation. The double star system is β Trianguli Australis.  Spectral Class: F1V  Distance: 40.37ly  Abs. Magnitude: ?

LITTLE BEAR GETS MULTIPLE STAR SYSTEM Ursa Minoris is the Little Bear Constellation. The star system with multiple (5) stars is α Ursa Minoris.  Spectral Class: F7Ib  Distance: 434 ly  Abs. Magnitude: -3.63