Aug 10, 2020 Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 76x
Seeing: 5 Transparency: 6 Moon: 0%
Large, bright, diffuse nebula surrounding a set of 7th magnitude stars, two distinct lobes north and south
The southern lobe is the eponymous Trifid, a bright 10' diameter round object centered on a pair of stars, 6.8 magnitude HIP88330 and 6.8 magnitude HD164492 which along with some close companions are the primary illumination source of the nebula, a set of dark rifts radiate out from these stars creating the divisions from which the name is derived
The northern lobe is a bit fainter and smaller at about 7' in diameter, centered on the 7.4 magnitude star HD164514 found 8' north of the central stars of the southern lobe, a round region of faint glow fading in all directions
Jun 27, 2020 Waikoloa Quarry, HI (map)
8x42mm Nikon Prostaff 3S Binoculars @ 8x
Seeing: 7 Transparency: 7 Moon: 0%
A small patch of nebula 1/2° across found 1.5° north of M8, a thick clump of brighter stars scattered through the object encompass the nebula and the cluster M21 to the north, the cluster is more apparent in binoculars than the fainter nebula
Aug 11, 2017 Waikoloa, HI (map)
Hodgepodge w/TV-76mm f/6 APO @ 30x
Seeing: 6 Transparency: 6 Moon: 0%
A circular patch of nebulosity surrounds a double star, round, about 10' in diameter, the famous namesake rifts not visible, M8 visible a bit over a degree south, M21 visible ½° northeast
Apr 19, 2012 Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 6 Transparency: 7 Moon: 0%
A beautiful and complex region of nebulosity that fills the 28' field of the eyepiece, large, very bright, cut by a pattern of wide dark lanes, the brighter western gegion is roughly circular, separated from the eastern region by a dark lane, the west region divided by three dark lanes radiating from the center, a conspicuous double star at the bright center, the eastern region somewhat dimmer and also showing dark lanes and brighter knots, notable dark void surround the complex
Jun 17, 2006 TIMPA, Avra Valley, AZ (map)
90mm f/12 APO Refractor Violet Haze
Round area of nebulosity surrounding a conspicuous double star, bright, the dark lanes that are so apparent with Violet or in photos are quite faint, the nebula split in two, not three or four, about 10' north a fainter patch of nebula surrounds the 7.3 mag. star
May 25, 2001 Dragoon Mtn. Ranch, Cochise Co., AZ (map)
46cm f/4.5 Deep Violet
Nebulosity all through the field, dark lanes very apparent
May 24, 1998 Picacho Peak State Park, AZ (map)
20cm f/10 SCT
Bright region near the central stars with dark lanes clearly visible, extensive nebulosity through the whole field
Rev. T.W. Webb
May 19, 1885 Hardwick, Herefordshire, England (map)
The Trifid neb. closely f a cruciform group. Very curious object; pair with minute comes 'where the three ways meet, dark rifts through the nebulosity.' β, with the 36-in., sees six stars. Spect. not gaseous; yet La. and Holden report curious change. Neb. imperfectly seen by Sm. as well as myself; rather low. Grand region.
― Celestial Objects for Common Telescopes, T. W. Webb, 1917
Jul 1, 1826
Very large; trifid, three nebulae with a vacuity in the midst, in which is centrally situated the double star Sh 379, the nebula is 7' in extent. A most remarkable object.
Jul 12, 1784 19 New King Street, Bath (map)
Three nebulae, faintly joined, form a triangle. In the middle is a double st[ar], vF [very faint], and of great extent.
May 3, 1783 19 New King Street, Bath (map)
18.5" reflector @ 350x
Two nebulae close together, both resolvable into stars; the preceding however leaves some doubt, though I suppose a higher power and more light would confirm the conjecture. 10 feet, power 350: the instrument will not bear a higher power in this low altitude.
May 23, 1764
Cluster of stars, a little above the Ecliptic, between the bow of Sagittarius & the right foot of Ophiuchus. Seen again March 22, 1781.
― Connaissance des Temps, 1781
Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.
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