Castor
Deneb is the dimmest star in Cygnus.
Gliese 229 is the dimmest star in the constellation Lepus
dimmest stars in aquarius
The dimmest star in the Phoenix constellation is HD 201626, which has an apparent magnitude of 5.59. It is a yellow-white F-type star located around 235 light-years away from Earth.
The dimmest star in the Pegasus constellation is likely to be one of its fainter stars, which may not have a common name but is listed with a designation such as HD 209087 or similar. These dim stars may be harder to observe with the naked eye or small telescopes due to their low brightness compared to brighter stars in the constellation.
The dimmest star in the constellation Aries is 40 Arietis, also known as Hamal. It is a binary star system with a primary component that is a spectral type K5III giant star, and it has an apparent magnitude of about 4.0, making it relatively faint compared to other stars in the constellation. While not the absolute dimmest possible, it is the least luminous among the prominent stars in Aries.
Beta and Alpha Herculis are both 2nd Magnitude (2.78) stars
The dimmest star in the constellation Leo is generally considered to be Wolf 359. It is a red dwarf star located approximately 7.8 light years away from Earth and is known for its low luminosity.
The dimmest star is Orion is HD 37605 with an apparentmagnitude of 8.69
The dimmest star in the defined area called Sagittarius is SWEEPS J175902.00-291323.7 with an apparent magnitude of +26.23.The dimmest star in the zodiac Sagittarius is ο Sgr (Manubrij or Manubrium) with an apparent magnitude of +3.76
The twins
Aside from Cancer being the dimmest zodiacal constellation, the planet Mars is in Cancer (as of 4/21/10)