NGC 6027d is a barred spiral galaxy that is strictly a visual member of Seyfert's Sextet, a compact group of galaxies, which is located in the constellation Serpens. NGC 6027d is not interacting with the other galaxies in the cluster, but is in the background and just happens to be in the same line of sight. The galaxy is nearly 700 million light years away from the interacting group and is believed to be extremely large in size.

NGC 6027d
A Hubble Space Telescope (HST) image of NGC 6027d.
Observation data (J2000 epoch)
Constellation	Serpens
Right ascension	15h 59m 12.9s[1]
Declination	+20° 45′ 35″[1]
Redshift	19809 ± 50 km/s[1]
Apparent magnitude (V)	16.5[1]
Characteristics
Type	SB(s)bc[1]
Apparent size (V)	0′.2 × 0′.2[1]
Other designations
UGC 10116 NED05,[1] PGC 56580[1]

One supernova has been observed in NGC 6027d: SN 1998fe (type unknown, mag. 18).^[2]