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Results for object MESSIER 101 (NGC 5457:[MGS2012] 001)

Overview
Cross-IDs (47)
Coordinates (64)
Redshifts (24)
Distances (116)
Classifications (132)
Galactic Extinctions
Notes (28)
Diameters (8)
Photometry & SED (169)
Spectra (14)
Images (147)
References (1634)
External Links
Survey Coverage

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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 MESSIER 101†. More information in the tabs above.
Cross-identifications				Essential note
MESSIER 101; MESSIER 102; NGC 5457; UGC 08981; ARP 026				M102 may be a duplicate obs. of M101; see Sawyer, JRASC 41, Nos 7
Coordinates for Preferred Position
Equatorial (J2000)					Galactic
RA, Dec	RA, Dec [Deg]	Unc Semi-major,minor ["]	Unc PA [deg]	Reference	Lon, Lat [deg]
14h03m12.5441s, +54d20m56.220s	210.802267, 54.348950	1.20E-01, 1.20E-01	0	2010ApJS..189...37E	102.037326, 59.771382
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
0.00080 +/- 0.00001	241.033170 +/- 2.098548	1991RC3.9.C...0000d	362 +/- 9	5.34 +/- 0.40	116
Classifications
Object Type	Morphology	Reference	Activity Type	Reference	Other
G	SAB(rs)cd	1991RC3.9.C...0000d			SAB(rs)cd HII
Quick-look Angular & Physical Diameters				Foreground Galactic Extinction (2011ApJ...737..103S)
Passband	Diameter ["]	Reference	Diameter [kpc]	A_λ [mag] V	A_λ [mag] K
POSS1 103a-O	2400.00	1962MCG1..C...0000V	77.31	0.023	0.003
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	0.2-4 keV (EINSTEIN)	19.35E-13 ergs sec^-1^ cm^-2^	1992ApJS...80..531F	1.02E+33 [W]	2.66E+06
UV	UV_3150 (m_T)	7.43 +/- 0.43 mag	1995A&AS..114..527R	-21.66 +/- 0.43 [mag]	1.67E+10 +/- 8.16E+09
Visible	R (Cousins) AB	7.76 +/- 0.03 mag	2014MNRAS.445..881C	-21.33 +/- 0.07 [mag]	1.49E+10 +/- 5.66E+08
Near-IR	H_tot (2MASS LGA)	5.805 +/- 0.042 mag	2003AJ....125..525J	-23.29 +/- 0.08 [mag]	1.22E+10 +/- 5.76E+08
Far-IR	FIR (IRAS)	6.05E-12 W m^-2^	1988ApJS...68...91R	3.20E+36 [W]	8.33E+09
Radio	57.5 MHz	6.5 +/- 2.5 Jy	1990ApJ...352...30I	1.97E+30 +/- 7.61E+29 [W]	5.13E+03 +/- 1.98E+03
†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 MESSIER 101

Coordinates for MESSIER 101

Preferred Position: 14h03m12.5441s +54d20m56.220s Equatorial J2000.0 ()

Preferred Position of MESSIER 101

Reference Frame	Longitude	Latitude	Longitude	Latitude	Uncertainty Ellipse (arcsec)
	Decimal Degrees	Decimal Degrees	Sexagesimal	Sexagesimal	Semimajor (a)	Semiminor (b)	PA (deg)
RA/Dec Equatorial (J2000.0)	210.802267	54.348950	14h03m12.5441s	+54d20m56.220s	1.20E-01	1.20E-01	0
RA/Dec Equatorial (B1950.0)	210.359890	54.588551	14h01m26.3736s	+54d35m18.784s	1.20E-01	1.20E-01	0
Galactic	102.037326	59.771382			1.20E-01	1.20E-01	0
Supergalactic	63.581559	22.612759			1.20E-01	1.20E-01	0
Ecliptic (J2000.0)	174.365409	59.797265			1.20E-01	1.20E-01	0
Ecliptic (B1950.0)	173.655729	59.797054			1.20E-01	1.20E-01	0

Measured Positions for MESSIER 101

Redshifts and Derived Quantities for MESSIER 101

Preferred Redshift: Z = 0.00080, H₀ = 67.8 km/sec/Mpc, Ωmatter = 0.308, Ωvacuum = 0.698

Quantities Derived from Preferred Redshift for MESSIER 101

Calculated and Corrected Velocities
Type	Velocities	Reference
V (Heliocentric)	241 ± 2 km/s	1991RC3.9.C...0000d
V (Kinematic LSR)	254 ± 2 km/s	1986MNRAS.221.1023K
V (Galactocentric GSR)	360 ± 5 km/s	1991RC3.9.C...0000d
V (Local Group)	379 ± 9 km/s	1996AJ....111..794K
V (3K CMB)	362 ± 9 km/s	1996ApJ...473..576F
V (Virgo Infall only)	418 ± 9 km/s	2000ApJ...529..786M
V (Virgo + GA only)	453 ± 9 km/s	2000ApJ...529..786M
V (Virgo + GA + Shapley)	455 ± 9 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)	5.31 ± 0.38 Mpc	(m-M) = 28.63 ± 0.15 mag
D (Local Group)	5.59 ± 0.41 Mpc	(m-M) = 28.74 ± 0.15 mag
D (3K CMB)	5.34 ± 0.40 Mpc	(m-M) = 28.64 ± 0.16 mag
D (Virgo Infall only)	6.17 ± 0.43 Mpc	(m-M) = 28.95 ± 0.15 mag
D (Virgo + GA only)	6.68 ± 0.47 Mpc	(m-M) = 29.12 ± 0.15 mag
D (Virgo + GA + Shapley)	6.72 ± 0.47 Mpc	(m-M) = 29.14 ± 0.15 mag

Scale at Hubble Flow Distances
Type	Values
Scale (Galactocentric GSR)	26 pc/arcsec = 0.026 kpc/arcsec = 1.55 kpc/arcmin = 0.09 Mpc/degree
Scale (Local Group)	27 pc/arcsec = 0.027 kpc/arcsec = 1.62 kpc/arcmin = 0.10 Mpc/degree
Scale (3K CMB)	26 pc/arcsec = 0.026 kpc/arcsec = 1.55 kpc/arcmin = 0.09 Mpc/degree
Scale (Virgo Infall only)	30 pc/arcsec = 0.030 kpc/arcsec = 1.79 kpc/arcmin = 0.11 Mpc/degree
Scale (Virgo + GA only)	32 pc/arcsec = 0.032 kpc/arcsec = 1.94 kpc/arcmin = 0.12 Mpc/degree
Scale (Virgo + GA + Shapley)	33 pc/arcsec = 0.033 kpc/arcsec = 1.95 kpc/arcmin = 0.12 Mpc/degree
Cosmology-Corrected Quantities [H₀ = 67.8 km/sec/Mpc, Ω_matter = 0.308, Ω_vacuum = 0.698]
[Redshift 0.001207 as corrected to the Reference Frame defined by the 3K CMB]
Type	Values
Luminosity Distance	5.34 Mpc (m-M) = 28.64 mag
Angular-Size Distance	5.33 (m-M) = 28.63 mag
Co-Moving Radial Distance	5.34 (m-M) = 28.64 mag
Co-Moving Tangential Distance	5.34 (m-M) = 28.64 mag
Co-Moving Volume	6.36e-07 Gpc^3
Light Travel-Time	0.017 Gyr
Age at Redshift 0.001207	13.813 Gyr
Age of Universe	13.830 Gyr
Scale (Cosmology Corrected)	26 pc/arcsec = 0.026 kpc/arcsec = 1.55 kpc/arcmin = 0.09 Mpc/degree
Surface Brightness Dimming	Flux Density per Unit Area = 0.99519; Magnitude per Unit Area = 0.005239 mag

Measured Redshifts of MESSIER 101

Images for object MESSIER 101 (NGC 5457:[MGS2012] 001)

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 MESSIER 101

External Resource Links for MESSIER 101

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Results for object MESSIER 101 (NGC 5457:[MGS2012] 001)

Images for object MESSIER 101 (NGC 5457:[MGS2012] 001)