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POSS-II F (North), AAO-SES/SERC-ER (South), Red image
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Image Credit: Caltech or AAO/ROE

Selected data and derived quantities for ARP 318†. More information in the tabs above.
Cross-identifications				Essential note
ARP 318; HCG 016; RSCG 19; EXSS 0207.1-1022;
Coordinates for Preferred Position
Equatorial (J2000)					Galactic
RA, Dec	RA, Dec [Deg]	Unc Semi-major,minor ["]	Unc PA [deg]	Reference	Lon, Lat [deg]
02h09m31.3s, -10d09m31s	32.380516, -10.158508	1.50E+01, 1.50E+01	0	1996AJ....112..871B	173.961740, -64.972321
Preferred Redshift & Derived Quantities [H₀ = km/sec/Mpc], Ωmatter = , Ωvacuum = ]					Redshift-independent Distances
z (Helio)	V (Helio) [km/s]	Reference	V (CMB) [km/s]	Hubble Distance (CMB) [Mpc]	# Measurements
0.01320 +/- N/A	3957.261000 +/- N/A	1992ApJ...399..353H	3706 +/- 18	50.77 +/- 3.56
Classifications
Object Type	Morphology	Reference	Activity Type	Reference	Other
GGroup	interacting quartet	1966ApJS...14....1A			6.4
Quick-look Angular & Physical Diameters				Foreground Galactic Extinction (2011ApJ...737..103S)
Passband	Diameter ["]	Reference	Diameter [kpc]	A_λ [mag] V	A_λ [mag] K
				0.070	0.008
Quick-look Photometry & Luminosities (brightest flux in each spectral region)
Spectral region	Band	Apparent mag or flux	Reference	Absolute Mag or νL_ν [W]	νL_ν [L_☉(bol)]
X-Ray
UV
Visible
Near-IR
Far-IR
Radio	2695 MHz (NRAO)	0.109 +/- 0.020 Jy	1976ApJS...32..171S	9.26E+31 +/- 2.51E+31 [W]	2.41E+05 +/- 6.53E+04
†Derived quantities are based on the median redshift-independent distance when available, otherwise the preferred redshift is used with the selected cosmological parameters (which can be changed in search options).
Cosmological params can be changed in search options.

Cross-identifications for ARP 318

Coordinates for ARP 318

Preferred Position: 02h09m31.3s -10d09m31s Equatorial J2000.0

Preferred Position of ARP 318 1996AJ....112..871B

Reference Frame	Longitude	Latitude	Longitude	Latitude	Uncertainty Ellipse (arcsec)
	Decimal Degrees	Decimal Degrees	Sexigesimal	Sexigesimal	Semimajor (a)	Semiminor (b)	PA (deg)
RA/Dec Equatorial (J2000.0)	32.380516	-10.158508	02h09m31.3s	-10d09m31s	1.50E+01	1.50E+01	0
RA/Dec Equatorial (B1950.0)	31.766667	-10.394444	02h07m04.0s	-10d23m40s	1.50E+01	1.50E+01	0
Galactic	173.961740	-64.972321			1.50E+01	1.50E+01	0
Supergalactic	291.264022	-20.511779			1.50E+01	1.50E+01	0
Ecliptic (J2000.0)	26.446548	-21.808408			1.50E+01	1.50E+01	0
Ecliptic (B1950.0)	25.745771	-21.811789			1.50E+01	1.50E+01	0

Measured Positions for ARP 318

Redshifts and Derived Quantities for ARP 318

Preferred Redshift: Z = 0.01320, H₀ = km/sec/Mpc, Ωmatter = , Ωvacuum =

Quantities Derived from Preferred Redshift for ARP 318

Calculated and Corrected Velocities
Type	Velocities	Reference
V (Heliocentric)	3957 ± N/A km/s	1992ApJ...399..353H
V (Kinematic LSR)	3946 ± N/A km/s	1986MNRAS.221.1023K
V (Galactocentric GSR)	3958 ± 0 km/s	1991RC3.9.C...0000d
V (Local Group)	3998 ± 2 km/s	1996AJ....111..794K
V (3K CMB)	3706 ± 18 km/s	1996ApJ...473..576F
V (Virgo Infall only)	3855 ± 10 km/s	2000ApJ...529..786M
V (Virgo + GA only)	3837 ± 10 km/s	2000ApJ...529..786M
V (Virgo + GA + Shapley)	3832 ± 10 km/s	2000ApJ...529..786M
Hubble Flow Distance and Distance Modulus (where H₀ = km/sec/Mpc ± km/sec/Mpc)
Type	Distance	Modulus
D (Galactocentric GSR)	54.21 ± 3.79 Mpc	(m-M) = 33.67 ± 0.15 mag
D (Local Group)	54.77 ± 3.83 Mpc	(m-M) = 33.69 ± 0.15 mag
D (3K CMB)	50.77 ± 3.56 Mpc	(m-M) = 33.53 ± 0.15 mag
D (Virgo Infall only)	52.81 ± 3.70 Mpc	(m-M) = 33.61 ± 0.15 mag
D (Virgo + GA only)	52.56 ± 3.68 Mpc	(m-M) = 33.60 ± 0.15 mag
D (Virgo + GA + Shapley)	52.49 ± 3.67 Mpc	(m-M) = 33.60 ± 0.15 mag

Scale at Hubble Flow Distances
Type	Values
Scale (Galactocentric GSR)	263 pc/arcsec = 0.263 kpc/arcsec = 15.77 kpc/arcmin = 0.95 Mpc/degree
Scale (Local Group)	0.95 pc/arcsec = 0.266 kpc/arcsec = 15.93 kpc/arcmin = 0.96 Mpc/degree
Scale (3K CMB)	246 pc/arcsec = 0.246 kpc/arcsec = 14.77 kpc/arcmin = 0.89 Mpc/degree
Scale (Virgo Infall only)	256 pc/arcsec = 0.256 kpc/arcsec = 15.36 kpc/arcmin = 0.92 Mpc/degree
Scale (Virgo + GA only)	255 pc/arcsec = 0.255 kpc/arcsec = 15.29 kpc/arcmin = 0.92 Mpc/degree
Scale (Virgo + GA + Shapley)	254 pc/arcsec = 0.254 kpc/arcsec = 15.27 kpc/arcmin = 0.92 Mpc/degree
Cosmology-Corrected Quantities [H₀ = km/sec/Mpc, Ω_matter = , Ω_vacuum = ]
[Redshift 0.012362 as corrected to the ]
Type	Values
Luminosity Distance	51.3 Mpc (m-M) = 33.55 mag
Angular-Size Distance	50 (m-M) = 33.50 mag
Co-Moving Radial Distance	50.6 (m-M) = 33.52 mag
Co-Moving Tangential Distance	50.6 (m-M) = 33.52 mag
Co-Moving Volume	0.000544 Gpc^3
Light Travel-Time	0.164 Gyr
Age at Redshift 0.012362	13.135 Gyr
Age of Universe	13.299 Gyr
Scale (Cosmology Corrected)	243 pc/arcsec = 0.243 kpc/arcsec = 14.55 kpc/arcmin = 0.87 Mpc/degree
Surface Brightness Dimming	Flux Density per Unit Area = 0.95204; Magnitude per Unit Area = 0.05336 mag

Measured Redshifts of ARP 318

Classifications for ARP 318

Notes for ARP 318

Photometry & SED for ARP 318

Quick-look Photometry & SED plot for ARP 318

Quick Look Photometry & Luminosities (brightest flux in each spectral region)	SED Plot

Photometry for ARP 318

Images for object ARP 318 (Arp 318)

POSS-II F (North), AAO-SES/SERC-ER (South), Red image
View in IRSA Finderchart

Image Credit: Caltech or AAO/ROE

Preview	File Size KB	Information	Lambda m	Clambda	Spectral Region	Band	FOV 1 arcmin	FOV 2 arcmin	Res. arcsec	Telescope	Refcode
Preview	File Size KB	Information	Lambda m	Clambda	Spectral Region	Band	FOV 1 arcmin	FOV 2 arcmin	Res. arcsec	Telescope	Refcode

Literature References for ARP 318

External Resource Links for ARP 318

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Images for object ARP 318 (Arp 318)

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