Rishi: Vājasaneyin tradition (ancestral formulae often treated as traditional rather than individually authored).
Devata: Pitaraḥ (Fathers) and, secondarily, Devas as the intended locus of yajña-ordering.
Chandas: Anuṣṭubh-like (two hemistichs; liturgical).
Samhita Patha (Devanagari)ये स॑मा॒नाः सम॑नसः पि॒तरो॑ यम॒राज्ये॑ । तेषाँ॑ल्लो॒कः स्व॒धा नमो॑ य॒ज्ञो दे॒वेषु॑ कल्पताम् ॥
Transliterationyé samānā́ḥ samánasaḥ pitáro yamárājye | téṣāṃl lokáḥ svadhā́ námo yajñó devéṣu kalpatām ||
Translationيا أيها الآباءُ الأسلاف، المتساوون والمتحدو العزم، في مملكةِ يَما—لهم العالَمُ و«سْفَدْها» (Svadhā): خضوعٌ وسلام! لِيُقَمِ القُربانُ (يَجْنَا) على وجهه بين الآلهة.
Padapatha (Word Analysis)ये । स॑मा॒नाः । सम॑नसः । पि॒तरः । यम॒-राज्ये॑ । तेषाम् । लोकः । स्व॒धा । नमः । य॒ज्ञः । दे॒वेषु॑ । कल्पताम् ॥
Word by Wordसमनसःof like mind, unanimous पितरःthe Fathers (ancestors) यमराज्येin Yama’s realm (kingdom of Yama) स्वधाSvadhā (ancestral oblation/formula) कल्पताम्may it be duly arranged / may it be fitting 
Entities MentionedP
Pitaraḥ (Fathers/Ancestors) Viniyoga (Ritual Application)