Rohini Nakshatra is defined traditionally as a mansion of five stars. In olden days, Europeans called it as Haydes. The following table provides candidates which qualify as Rohini Nakshatra from brightness point of view, location with reference to moon traverse band and distance from previous Nakshatra.
Nakshatra |
No. |
SAO |
HD |
Bayer |
Bright |
Arab/Other |
Rohini |
5 |
94027 |
29139 |
87 a Tau |
+0.85 |
Al Debaran |
|
|
93955 |
28307 |
77q1 Tau |
+3.85 |
- |
|
|
93868 |
27371 |
54 g Tau |
+3.63 |
- |
|
|
93897 |
27697 |
61 D Tau |
+3.76 |
- |
|
|
93954 |
28305 |
75 e Tau |
+3.53 |
- |
Rohini is the brightest of the 27 Stars used for Bharateeya Nakshatra system of names, with a brightness of 0.85. Rohini is identified as birth star of Sri krishna. The distance between Krittika and Rohini is about 12.5 degrees (E-W). If a single star has to be identified as representing Rohini Nakshatra, best candidate is 87aTau/SAO-94027/HD -29139/ Aldebaran.
Mrigashiras is traditionally defined as a mansion of three stars. The following table provides candidates which qualify as Mrigashira Nakshatra from brightness point of view, location with reference to moon traverse band and distance from previous Nakshatra.
Nakshatra |
No. |
SAO |
HD |
Bayer |
Bright |
Arab/Other |
Mrigashiras |
3 |
77168 |
35479 |
112 b Tau |
+1.65 |
El nath |
|
|
77336 |
37202 |
123 z Tau |
+2.98 |
- |
|
|
94628 |
36389 |
119CE |
+4.38 |
- |
Mrigashiras Nakshatra is associated with month of Maargashira where, on full moon day, moon will be near Mrigashira Nakshatra. This approximates to month of December. The Zodiac name Vrishbha suggests a bull with horns, and Mrigashiras is the head of the bull. With some imagination, in figure 2 one can imagine springing bull. Mrigashiras has been named El Nath by Arabs. If a single star has to be identified as representing Mrigashira Nakshatra, best candidate is 112b Tau /SAO-77168 /HD -35497/ Elnath.
The distance between Rohini and Mrigashiras is about 50 minutes corresponding to 12.5 degrees (E-W) not too far from 13.33 requirement. All the Vrishbha stars are within the Moon traverse band.
In the Raashi/Nakshatra translation, 1/4 of Krittika is treated as a part of Mesha and 3/4 of Krittika is treated as Vrishbha Raashi. Rohini is considered to be fully in Vrishbha while 1/2 of Mrigashiras is in Vrishabha and the other 1/2 is in Mithuna.