D/1827 M1 (Pons-Gambart)

Orbital elements by s. Nakano (via C. Spratt)
    
    T = Sept. 5.5747, 2015 +/- 10 yr
    q = 0.8029 AU
    e = 0.9494
    w = 19.412°   J2000.0
    N = 320.3295° J2000.0
    i = 136.539°  J2000.0