Permanent object 174 follows the Finest catalogue's NGC 1973 entry together with NGC 1975 and NGC 1977. The three numbers describe neighbouring bright patches separated by dark lanes, and “NGC 1977” is often used informally for the entire Running Man complex. NASA describes the group as reflection nebulae in Orion's Sword, just north of the much brighter Orion Nebula, and part of the same giant molecular-cloud environment. Source: [NASA Astronomy Picture of the Day, “Reflections on the 1970s”](https://apod.nasa.gov/apod/ap230202.html).
Reflection nebulosity is starlight scattered by dust; it is not gas producing blue light at a single atomic wavelength. NGC 1977 is also a composite emission-line region. Ultraviolet radiation from hot stars ionizes some gas, while dust scatters a broad continuum. Dark material in front of the bright background draws the running human silhouette seen in long-exposure images. The familiar nickname describes that photographic contrast, not a separate astronomical object with a precise boundary.
William Herschel recorded the brightest southern nebulosity around 42 Orionis in 1786. Heinrich Louis d'Arrest later distinguished the smaller NGC 1973 and NGC 1975 patches in 1862 and 1864. Dreyer's New General Catalogue preserved the separate observations, which is why a continuous modern image carries three numbers. Historical identifications and observing notes are compiled in [the Revised NGC account](https://cseligman.com/text/atlas/ngc19a.htm).
The region is still forming stars. A multiwavelength review counted more than 100 young stars in NGC 1977 using optical and infrared observations together with Spitzer and Chandra data. It described NGC 1977 and the adjacent OMC-2/3 filament as one of the nearest vigorous star-forming areas, while noting that subgroup membership and relationships among the young populations remain uncertain. Source: [Peterson & Megeath, “The Orion Molecular Cloud 2/3 and NGC 1977 Regions”](https://arxiv.org/abs/0809.4006).
Hubble and Spitzer images revealed seven proplyds—young stars surrounded by comet-shaped ionization fronts—at projected distances 0.04 to 0.27 parsec from the B1 V star 42 Orionis. The researchers adopted a distance near 400 parsecs and identified 42 Orionis as the main ultraviolet source. Because a B1 star supplies a weaker extreme-ultraviolet field than the O star dominating the Orion Nebula Cluster, NGC 1977 samples a more moderate disk-photoevaporation environment. Source: [Kim et al., *The Astronomical Journal* 151, 68](https://arxiv.org/abs/1606.08271). A projected distance is only separation on the sky; the true three-dimensional spacing can be larger.
The repository position is approximately right ascension 5h 35m and declination −4° 44′. It culminates around 40° high from latitude 45° N and 60° from 35° S. These are original coordinate calculations and do not include the week's observing conditions.
Use Orion's Sword as the route. Locate the bright M42/M43 complex, then move about 0.72° north to the stars and fainter haze of the Running Man. Stay at low power so both regions fit in context, and confirm that the target is north of M42 rather than part of its brightest core. The rendered accepted finder and reader link remain unchecked.
Binoculars show the sword's stars, but visual nebulosity is subtle. A small telescope under a dark transparent sky may reveal faint haze around the brighter stars; larger aperture and a wide field help with the dark-lane pattern. A narrowband filter can enhance emission while suppressing the broadband reflected light and stars, so compare filtered and unfiltered views. The running figure is chiefly photographic. Record each patch conservatively and leave Moon and transparency to the weekly calendar.
