NGC 6505

NGC 6505
NGC 6505
	NGC 6505 imaged by Euclid, with LEDA 2678036 (lower left) and LEDA 2678425 (upper right)
Observation data (J2000 epoch)
Constellation	Draco
Right ascension	17h 51m 07.4726s
Declination	+65° 31′ 50.925″
Redshift	0.042414 ± 0.0000160
Heliocentric radial velocity	12,715±5 km/s
Distance	186.55 ± 13.06 Mpc (608.4 ± 42.6 Mly)
Apparent magnitude (V)	14.6
Apparent magnitude (B)	15.6
Surface brightness	14.8
Characteristics
Type	E-S0
Size	~243,300 ly (74.59 kpc) (estimated)
Apparent size (V)	1.1′ × 1.0′
Other designations
	2MASX J17510740+6531507, UGC 11026, MCG +11-22-007, PGC 60995, CGCG 322-018

NGC 6505 is an elliptical galaxy with Hubble sequence classification E/S0 in the northern celestial hemisphere constellation Draco. It is about 608 million light years away from the Milky Way galaxy and has a diameter of about 190,000 light years. It was discovered on June 27, 1884 by Lewis A. Swift.^[4] In 2025, the Euclid Space Telescope found a complete Einstein ring surrounding NGC 6505.^[5]

With the help of the lens model some properties of the central region of NGC 6505 were estimated. One result is that the central region has an initial mass function that is heavier than predicted with Chabrier and a dark matter fraction of 11.1+5.4
−3.5 % inside the Einstein radius.^[3]

^ ^a ^b ^c ^d ^e ^f "Results for object NGC 6505". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 11 February 2025.
^ ^a ^b ^c SEDS: NGC 6505
^ ^a ^b Cite error: The named reference O’Riordan2025 was invoked but never defined (see the help page).
^ Seligman
^ Knud Jahnke (2025-02-10). "Euclid finds complete Einstein Ring in NGC galaxy". Euclid Consortium. Euclid Consortium. Retrieved 2025-02-10.

[ned-1] ^ ^a ^b ^c ^d ^e ^f "Results for object NGC 6505". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 11 February 2025.

[SEDS-2] SEDS: NGC 6505

[O’Riordan2025-3] Cite error: The named reference O’Riordan2025 was invoked but never defined (see the help page).

[4] Seligman

[5] Knud Jahnke (2025-02-10). "Euclid finds complete Einstein Ring in NGC galaxy". Euclid Consortium. Euclid Consortium. Retrieved 2025-02-10.

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NGC 6505
NGC 6505 imaged by Euclid, with LEDA 2678036 (lower left) and LEDA 2678425 (upper right)
Observation data (J2000 epoch)
Constellation	Draco
Right ascension	17^h 51^m 07.4726^s^[1]
Declination	+65° 31′ 50.925″^[1]
Redshift	0.042414 ± 0.0000160^[1]
Heliocentric radial velocity	12,715±5 km/s^[1]
Distance	186.55 ± 13.06 Mpc (608.4 ± 42.6 Mly)^[1]
Apparent magnitude (V)	14.6^[2]
Apparent magnitude (B)	15.6^[2]
Surface brightness	14.8
Characteristics
Type	E-S0^[2]
Size	~243,300 ly (74.59 kpc) (estimated)^[1]
Apparent size (V)	1.1′ × 1.0′
Other designations
2MASX J17510740+6531507, UGC 11026, MCG +11-22-007, PGC 60995, CGCG 322-018