Andrew Cooper
Dec 12, 2021    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 76x
Seeing: 6 Transparency: 7 Moon: 0%

ε Mon is a fine double, a white primary ε MonA to the south with a pale yellow companion ε MonB about 2 magnitudes fainter visible 12" northeast in a rich galactic starfield

Captain William Henry Smyth
Mar 11, 1834    No. 6 The Crescent, Bedford, England (map)
150mm f/17.6 refractor by Tully 1827

A neat double star, in the Unicorn's nostril; where a glance from Aldebaran, passed closely over the head and shoulders of Orion, will find it at about 7½° east of Betelgeuze. A 5½, golden yellow; B 8, lilac. This fine object is composed of Piazzi's Nos. 84 and 85 of Hora VI.; and it was classed 29 ♅. III., in 1781, but no measures were then taken. Subsequent observations afford reasonable presumption of its retrograding, in the approximate ratio of -0.75:

    H. and S. Pos. 25° 21' Dist. 14".379 Ep. 1823.04
    Σ.             25° 52'       13".865     1831.74
   [WDS            29°           12".20      2019   ]

― A Cycle of Celestial Objects Vol II, The Bedford Catalogue, William Henry Smyth, 1844