Today (June 8th, 2012) Vaikasi Rohini is the varusha thirunakshitram of Thirukoshtiyur Nambigal. This acharyan of Swami Ramanujar gave him the name Emperumanar. The following is the Acharyan’s Thanian and the related vaibhavam …
Thanian:
The following are the links to the ongoing Avatara Utsavam at Thirukoshtiyur Sri Sowmiyanarayana Perumal Thirukkoil…
http://anudinam.org/2013/06/06/thirukoshtiyur-nambigal-avatara-utsavam/
http://anudinam.org/2013/06/01/thirukoshtiyur-nambi-avatara-utsavam/