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Cosmological Parameters

H₀

Ω_matter

Ω_vacuum

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Results for object ARP 317 (Leo TRIPLET)

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 317†. More information in the tabs above.
Cross-identifications				Essential note
ARP 317; Leo I GROUP NED02; Leo TRIPLET; LGG 231; USGC U374				Contains the GPair VV 308.
Coordinates for Preferred Position
Equatorial (J2000)					Galactic
RA, Dec	RA, Dec [Deg]	Unc Semi-major,minor ["]	Unc PA [deg]	Reference	Lon, Lat [deg]
11h19m41s, +13d11.7m	169.922127, 13.195366	1.50E+02, 1.50E+02	0	1993A&AS..100...47G	241.393163, 64.431043
Preferred Redshift & Derived Quantities [H₀ = 67.8 km/sec/Mpc], Ωmatter = 0.308, Ωvacuum = 0.698]					Redshift-independent Distances
z (Helio)	V (Helio) [km/s]	Reference	V (CMB) [km/s]	Hubble Distance (CMB) [Mpc]	# Measurements
0.00267 +/- N/A	799.846390 +/- N/A	1997AJ....113..483R	1148 +/- 24	16.93 +/- 1.24
Classifications
Object Type	Morphology	Reference	Activity Type	Reference	Other
GGroup	interacting triple	1966ApJS...14....1A
Quick-look Angular & Physical Diameters				Foreground Galactic Extinction (2011ApJ...737..103S)
Passband	Diameter ["]	Reference	Diameter [kpc]	A_λ [mag] V	A_λ [mag] K
				0.076	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
†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 317

Coordinates for ARP 317

Preferred Position: 11h19m41s +13d11.7m Equatorial J2000.0 ()

Preferred Position of ARP 317

Measured Positions for ARP 317

Redshifts and Derived Quantities for ARP 317

Preferred Redshift: Z = 0.00267, H₀ = 67.8 km/sec/Mpc, Ωmatter = 0.308, Ωvacuum = 0.698

Quantities Derived from Preferred Redshift for ARP 317

Calculated and Corrected Velocities
Type	Velocities	Reference
V (Heliocentric)	800 ± N/A km/s	1997AJ....113..483R
V (Kinematic LSR)	799 ± N/A km/s	1986MNRAS.221.1023K
V (Galactocentric GSR)	716 ± 3 km/s	1991RC3.9.C...0000d
V (Local Group)	664 ± 8 km/s	1996AJ....111..794K
V (3K CMB)	1148 ± 24 km/s	1996ApJ...473..576F
V (Virgo Infall only)	523 ± 13 km/s	2000ApJ...529..786M
V (Virgo + GA only)	558 ± 13 km/s	2000ApJ...529..786M
V (Virgo + GA + Shapley)	559 ± 13 km/s	2000ApJ...529..786M
Hubble Flow Distance and Distance Modulus (where H₀ = 67.8 km/sec/Mpc ± km/sec/Mpc)
Type	Distance	Modulus
D (Galactocentric GSR)	10.56 ± 0.74 Mpc	(m-M) = 30.12 ± 0.15 mag
D (Local Group)	9.79 ± 0.70 Mpc	(m-M) = 29.95 ± 0.15 mag
D (3K CMB)	16.93 ± 1.24 Mpc	(m-M) = 31.14 ± 0.15 mag
D (Virgo Infall only)	7.71 ± 0.56 Mpc	(m-M) = 29.44 ± 0.15 mag
D (Virgo + GA only)	8.23 ± 0.58 Mpc	(m-M) = 29.58 ± 0.15 mag
D (Virgo + GA + Shapley)	8.25 ± 0.58 Mpc	(m-M) = 29.58 ± 0.15 mag

Scale at Hubble Flow Distances
Type	Values
Scale (Galactocentric GSR)	51 pc/arcsec = 0.051 kpc/arcsec = 3.07 kpc/arcmin = 0.18 Mpc/degree
Scale (Local Group)	47 pc/arcsec = 0.047 kpc/arcsec = 2.85 kpc/arcmin = 0.17 Mpc/degree
Scale (3K CMB)	82 pc/arcsec = 0.082 kpc/arcsec = 4.92 kpc/arcmin = 0.30 Mpc/degree
Scale (Virgo Infall only)	37 pc/arcsec = 0.037 kpc/arcsec = 2.24 kpc/arcmin = 0.13 Mpc/degree
Scale (Virgo + GA only)	40 pc/arcsec = 0.040 kpc/arcsec = 2.39 kpc/arcmin = 0.14 Mpc/degree
Scale (Virgo + GA + Shapley)	40 pc/arcsec = 0.040 kpc/arcsec = 2.40 kpc/arcmin = 0.14 Mpc/degree
Cosmology-Corrected Quantities [H₀ = 67.8 km/sec/Mpc, Ω_matter = 0.308, Ω_vacuum = 0.698]
[Redshift 0.003829 as corrected to the Reference Frame defined by the 3K CMB]
Type	Values
Luminosity Distance	17 Mpc (m-M) = 31.15 mag
Angular-Size Distance	16.9 (m-M) = 31.13 mag
Co-Moving Radial Distance	16.9 (m-M) = 31.14 mag
Co-Moving Tangential Distance	16.9 (m-M) = 31.14 mag
Co-Moving Volume	2.03e-05 Gpc^3
Light Travel-Time	0.055 Gyr
Age at Redshift 0.003829	13.775 Gyr
Age of Universe	13.830 Gyr
Scale (Cosmology Corrected)	82 pc/arcsec = 0.082 kpc/arcsec = 4.90 kpc/arcmin = 0.29 Mpc/degree
Surface Brightness Dimming	Flux Density per Unit Area = 0.98483; Magnitude per Unit Area = 0.0166 mag

Measured Redshifts of ARP 317

Classifications for ARP 317

Galaxy Extinctions for ARP 317

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 317

External Resource Links for ARP 317