Lord Anugraha Vinayaka graces in the temple from His separate shrine.  Planet Kethu with his serpent head and human body is facing west on his Simha (lion) seat with folded hands worshipping Lord Shiva.  He is the authority for wisdom.  He is a fearless planet doing all good for the devotees belonging to his Rasi.  People pray to planet Kethu for excellence in education and family prosperity.  Those facing some adverse aspects of this planet, pray first to Lord Naganatha and Kethu with red flowers, offering horsegram rice – Kollu sadham – as nivedhana and light seven deepas.

Those suffering from gastric troubles, neurological set backs, lacking courage and those aspiring progress in trade and undertakings, seeking unity and prosperity in family and longevity and welfare of succeeding generations pray to Lord Naganathaswami and planet Kethu.  They perform milk abishek on their birth star days with nivedhana and offer vastras in different colours.

Pujas are performed to planet Kethu at Rahukalas and Yemakanda Kala times.  90 minutes each day is covered by these times.  There will be 16 types of abishek and homas with a nivedhana made of gram powder, salt and pepper in rice.  Vastras are offered in different colours.  They light lamps with gingely oil.  The nivedhana should be distributed in the temple to visitors and should not be taken home.  This Prasad is prepared in the temple itself for a fee of Rs. 75/=.  Kethu worship is followed on Mondays and birth star days.  The fee for abishek is Rs. 350 and for Homas Rs. 3,500 for individual pujas.  People pray to planet Kethu for general family welfare and prosperity, success in litigations, progress in trade, avoidance of accidents, freedom from fear of death etc. Vasuki (the serpent used as rope to churn the milk ocean) festival is celebrated in Panguni (March-April).  On the 3^rd day of the festival, the event of Lord Shiva granting Darshan to Kethu is celebrated.  Planet Kethu comes in procession on this day and on the Rahu-Kethu transition days.

On the Rahu-Kethu transition day, a special Homa is organized by the Archakas-priests-of the temple.  There is no fee for participating in the puja.  According to numerology, No. 7 belongs to Kethu.  !6 types (1+6=7) of pujas are performed chanting 7 lakh mantras.  Preparations made of Kollu and sweet balls made of this grain, porridge, vada, choornam, rice, pudding-pongal – all made with kollu are offered in the Homa Fire.  Devotees offer 16 types of Dhans (alms) to Brahmins.  Feeding also is organized to 7000 devotees this day.  Devotees offer all the things needed for this occasion to the temple in advance.

There is no Navagraha shrine in the temple as Kethu has all the prominence.  However, there are two Sun idols and a Saturn idol in the temple.  Pujas are performed to one Sun during the Utharayayana Punyakala covering January-February to June-July and to the other Sun during the Dakshinayana Punyakala covering July-August to December-January.

During the churning of the milk ocean, Vasuki the serpent used as the rope for the purpose got exhausted and split its venom.  Devas ran to Lord Shiva for protection from the impact of the spreading poison.  Lord swallowed the poison and protected the world.  Vasuki felt that it had caused Lord Shiva to swallow its poison and performed penance seeking Lord’s pardon.  Lord gave darshan to Vasuki and admired its sense of sacrifice.  Vasuki begged Lord Shiva to stay in the place.  Lord obliged Vasuki and stayed here named after the serpent-Naga – Naganathar.