Rishi: Agni-hymnic seer tradition (undetermined here).
Devata: Agni (and, by extension, the Yajña as a totality).
Chandas: Anuṣṭubh-like (uncertain).
Samhita Patha (Devanagari)भ॒द्रो नो॑ अ॒ग्निराहु॑तो भ॒द्रा रा॒तिः सु॑भग भ॒द्रो अ॑ध्व॒रः । भ॒द्रा उ॒त प्रश॑स्तयः
Transliterationbhadro no agnir āhuto bhadrā rātiḥ subhaga bhadro adhvaraḥ | bhadrā uta praśastayaḥ
Translationอัคนีเมื่อถูกอัญเชิญย่อมเป็นมงคลแก่เรา; ทานนั้นเป็นมงคล โอ้ผู้เอื้อเฟื้อ; ยัญพิธีเป็นมงคล; และคำสรรเสริญทั้งหลายก็เป็นมงคลด้วย
Padapatha (Word Analysis)भद्रः । नः । अग्निः । आ-हुतः । भद्रा । रातिः । सु-भग । भद्रः । अध्वरः । भद्राः । उत । प्रशस्तयः
Word by Wordभद्रःauspicious, благоприятный आहुतःinvoked/oblated; having been offered रातिःgift, giving, bounty सुभगO fortunate one / O auspicious one अध्वरःsacrifice, ritual (adhvara) प्रशस्तयःpraises, commendations 
Entities MentionedV
Vāc (Ritual Speech/Praise) Viniyoga (Ritual Application)