21. Some semiregular and irregular variables are less luminous giant stars, while others are more luminous supergiants including some of the VY CMa. 22. It is classified as a slow irregular variable and its brightness varies from magnitude + 4.75 to + 4.93. 23. BE Camelopardalis is a red irregular variable star and its brightness varies from magnitude + 4.35 to + 4.48. 24. V520 Carinae is an orange irregular variable star and its brightness varies from magnitude + 4.63 to + 4.70. 25. It has never been observed since, but that does not preclude the possibility of it being a highly irregular variable star or a recurrent nova. 26. It is classified as an slow irregular variable of type LC and its brightness varies from magnitude + 4.24 to + 4.34. 27. Lambda Pavonis is a bright irregular variable ranging between magnitudes 3.4 and 4.4; this variation can be observed with the unaided eye. 28. This star is a slow irregular variable of type LB . Its brightness varies between K, meaning it is brighter, yet cooler, than the Sun. 29. Antares is a type " LC " slow irregular variable star, whose apparent magnitude slowly varies from + 0.6 to + 1.6. 30. R Coronae Australis is an irregular variable star ranging from magnitudes 9.7 to 13.9 . Blue-white, it is of spectral type B5IIIpe.
