τ1 Capricorni has a stellar classification of K1 III, indicating that it is an ageing K-type giant. At present it has 118% the mass of the Sun and an enlarged radius of .
The stellar classification of τ1 Capricorni is K1 III, indicating it is an aged K-type giant. At present, its mass is 118% that of the Sun and its radius exceeds normal.