Help Detailed Information for a Named Object

Object Name

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Cosmological Parameters

H₀

Ω_matter

Ω_vacuum

Presets

WMAP (Three-Year)

WMAP (Five-Year)

WMAP (Nine-Year)

Planck 2015

Correct Redshift to:

Results for object NGC 7421 (ngc7421)

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

Selected data and derived quantities for NGC 7421†. More information in the tabs above.
Cross-identifications				Essential note
; ; ; ;
Coordinates for Preferred Position
Equatorial (J2000)					Galactic
RA, Dec	RA, Dec [Deg]	Unc Semi-major,minor ["]	Unc PA [deg]	Reference	Lon, Lat [deg]
,	,	,			,
Preferred Redshift & Derived Quantities [H₀ = 73 km/sec/Mpc], Ωmatter = 0.27, Ωvacuum = 0.73]					Redshift-independent Distances
z (Helio)	V (Helio) [km/s]	Reference	V (CMB) [km/s]	Hubble Distance (CMB) [Mpc]	# Measurements
+/-	+/-		+/-	+/-
Classifications
Object Type	Morphology	Reference	Activity Type	Reference	Other
G
Quick-look Angular & Physical Diameters				Foreground Galactic Extinction (2011ApJ...737..103S)
Passband	Diameter ["]	Reference	Diameter [kpc]	A_λ [mag] V	A_λ [mag] K

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 NGC 7421

Coordinates for NGC 7421

Preferred Position: Equatorial J2000.0 ()

Preferred Position of NGC 7421

Measured Positions for NGC 7421

Redshifts and Derived Quantities for NGC 7421

Preferred Redshift: Z = , H₀ = 73 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73

Quantities Derived from Preferred Redshift for NGC 7421

Calculated and Corrected Velocities
Type	Velocities	Reference
V (Heliocentric)	± km/s
V (Kinematic LSR)	± km/s
V (Galactocentric GSR)	± km/s
V (Local Group)	± km/s
V (3K CMB)	± km/s
V (Virgo Infall only)	± km/s
V (Virgo + GA only)	± km/s
V (Virgo + GA + Shapley)	± km/s
Hubble Flow Distance and Distance Modulus (where H₀ = 73 km/sec/Mpc ± km/sec/Mpc)
Type	Distance	Modulus
D (Galactocentric GSR)	± Mpc	(m-M) = ± mag
D (Local Group)	± Mpc	(m-M) = ± mag
D (3K CMB)	± Mpc	(m-M) = ± mag
D (Virgo Infall only)	± Mpc	(m-M) = ± mag
D (Virgo + GA only)	± Mpc	(m-M) = ± mag
D (Virgo + GA + Shapley)	± Mpc	(m-M) = ± mag

Scale at Hubble Flow Distances
Type	Values
Scale (Galactocentric GSR)	pc/arcsec = kpc/arcsec = kpc/arcmin = Mpc/degree
Scale (Local Group)	pc/arcsec = kpc/arcsec = kpc/arcmin = Mpc/degree
Scale (3K CMB)	pc/arcsec = kpc/arcsec = kpc/arcmin = Mpc/degree
Scale (Virgo Infall only)	pc/arcsec = kpc/arcsec = kpc/arcmin = Mpc/degree
Scale (Virgo + GA only)	pc/arcsec = kpc/arcsec = kpc/arcmin = Mpc/degree
Scale (Virgo + GA + Shapley)	pc/arcsec = kpc/arcsec = kpc/arcmin = Mpc/degree
Cosmology-Corrected Quantities [H₀ = 73 km/sec/Mpc, Ω_matter = 0.27, Ω_vacuum = 0.73]
[Redshift as corrected to the Reference Frame defined by the 3K CMB]
Type	Values
Luminosity Distance	Mpc (m-M) = mag
Angular-Size Distance	(m-M) = mag
Co-Moving Radial Distance	(m-M) = mag
Co-Moving Tangential Distance	(m-M) = mag
Co-Moving Volume	Gpc^3
Light Travel-Time	Gyr
Age at Redshift	Gyr
Age of Universe	Gyr
Scale (Cosmology Corrected)	pc/arcsec = kpc/arcsec = kpc/arcmin = Mpc/degree
Surface Brightness Dimming	Flux Density per Unit Area = ; Magnitude per Unit Area = mag

Measured Redshifts of NGC 7421

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 NGC 7421

External Resource Links for NGC 7421

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