LEDA 74886
False color image of galaxy LEDA 74886, taken by theSubaru Telescope. The contrast of this image has been adjusted to highlight the internal disk/bar like structure.
Observation data (J2000epoch)
Constellation	Eridanus
Right ascension	03h 40m 43.233s[1]
Declination	−18° 38′ 43.10″[1]
Distance	70,000 kly (21,000 kpc)h−1 0.73
Group orcluster	NGC 1407[2]
Characteristics
Type	S0[3]
Mass	1×109 M☉
Other designations
2MASX J03404323-1838431,6dFGS gJ034043.2-183843[1]

LEDA 74886, also known by its2MASX designation2MASX J03404323-1838431, and sometimes known as theEmerald-cut Galaxy,^[4] is adwarf galaxy with a rare rectangular shape.^[2] It is located at a distance of about 70,000,000 light-years (21 Mpc) in theEridanusconstellation.^[5] The galaxy was detected in a widefield of view image taken by theSubaru Telescope using the Subaru Prime Focus Camera (Suprime-Cam).^[6][7] Using theKeck Telescope, a thindisc with a side on orientation was confirmed to be lurking at the center of LEDA 74886, and spinning at a speed of 33 km/s at the orbital radius of half a kpc.^[2] LEDA 74886 has a mass of around 10⁹M_☉ (Compared to theMilky Way's mass of about 10¹²M_☉).

LEDA 74886 is located in thecelestial sphere at aright ascension (${\displaystyle \alpha }$) of03^h 40^m 43.2^s, and adeclination (${\displaystyle \delta }$) of −18° 38′ 43″ (J2000). It is located within theGalactic corona ofNGC 1407, a massivespherical galaxy which is located approximately 163,000 ly (50 kpc) to the northwest of LEDA 74886.^[2]

• SDSS J074018.17+282756.3 is a spiral galaxy with arms that have a somewhat squarish-looking interior, but is distinct from LEDA 74886, because LEDA 74886 has no apparent spiral structure and a boxy like exterior form.^[2]
• Sextans A, a member of thelocal group, has a box like form due to its expanding shell of young blue stars, but it has a much lower mass and density, and includes a central disc which LEDA 74886 does not include.^[2]
• NGC 4488

• Eridanus (constellation)
• Lenticular galaxies
• LEDA objects

• Articles with short description
• Short description is different from Wikidata