Star in the constellation Aries
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! style="text-align: center; background-color: #FFFFC0;" colspan="2" | Observation dataEpoch J2000.0
       Equinox J2000.0 (ICRS)
! style="text-align:left" | Constellation
! style="text-align:left" | Right ascension
! style="text-align:left" | Declination
! style="text-align:left" | Apparent magnitude (V)
! style="background-color: #FFFFC0; text-align: center;" colspan="2"| Characteristics
! style="text-align:left" | Spectral type
! style="text-align:left" | U−B 
! style="text-align:left" | B−V 
! style="text-align:left" | R−I 
! style="text-align:left" | Variable type
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Rho2 Arietis is an M-type red giant star in the northern constellation of Aries. Its brightness varies from magnitude 5.45 to 6.01, making it faintly visible to the naked eye under good observing conditions. With an annual parallax shift of 9.28 mas, it is approximately distant from the Earth.
Rho2 Arietis is classified as a semiregular variable star with periods of 49.9 and 54.8 days. It has the variable star designation, RZ Arietis. It is probably an asymptotic giant branch star, having exhausted its core helium. It is predicted to have started its life with 1.5 solar masses. At its current evolutionary stage, Rho2 Arietis has expanded to 108 times the Sun's radius and is radiating 1,400 times the Sun's luminosity. 
This star possesses a strong magnetic field, one of the strongest for M-type giants. It also possesses a high lithium abundance, higher than expected from evolutionary models. The strong magnetic field, rapid rotation and unusual lithium abundance might be explained by a planet engulfment, when the star was on the red-giant branch.
References.
 ;templatestyles src="Reflist/styles.css" / ;
 ;indicator name="01-sky-coordinates" ; ;templatestyles src="Template:Sky/styles.css" / ;Coordinates: &amp;de=18.33163972222222&amp;zoom=&amp;show_grid=1&amp;show_constellation_lines=1&amp;show_constellation_boundaries=1&amp;show_const_names=1&amp;show_galaxies=1&amp;img_source=IMG_all 02h 55m 48.4978s, +18° 19′ 53.903″ ;/indicator ;