SOURCE LISTRow Object Name EquJ2000.0 Object Velocity/Redshift Mag./ Separ. Number of Row No. (* => Essential Note) RA DEC Type km/s z Qual Filter arcmin Refs Notes Phot Posn Vel/z Diam Assoc Images Spectra No. 1 *NGC 2557 08h19m10.7s +21d26m09s G 4865 0.016228 13.7g ... 58 2 77 12 10 15 0 Retrieve Retrieve 1 |
INDEX for NGC 2557 | |||
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Detailed Data (NED queries): |
ESSENTIAL NOTE for NGC 2557 (Back to INDEX)The 2MASS position is 5 arcsec east of the nucleus. |
CROSS-IDENTIFICATIONS for NGC 2557 (Back to INDEX)
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COORDINATES for NGC 2557 (Back to INDEX) Position Reference:2007SDSS6.C...0000: Reference Frame Longitude Latitude RA DEC Uncertainty Ellipse (arcsec) (degrees) (degrees) Semimajor Semiminor PA(deg) Equatorial (B1950.0) 124.063681 21.593168 08h16m15.283s +21d35m35.40s 5.00E-01 5.00E-01 0 Equatorial (J2000.0) 124.794775 21.435782 08h19m10.746s +21d26m08.82s 5.00E-01 5.00E-01 0 Ecliptic (B1950.0) 121.403265 1.785072 5.00E-01 5.00E-01 0 Ecliptic (J2000.0) 122.101837 1.790308 5.00E-01 5.00E-01 0 Galactic 202.004699 28.431664 5.00E-01 5.00E-01 0 SuperGalactic 56.103424 -47.507720 5.00E-01 5.00E-01 0Additional detailed measurements with references are also available by clicking below: 12 Position data point(s) |
REDSHIFT-INDEPENDENT DISTANCES for NGC 2557 (Back to INDEX) 2 Distances found in NED View 2 Individual Distance Measurement(s) for NGC 2557 Summary Statistics computed by NED from 2 Distance(s) in the literature: NOTE: These summary statistics are provided for "quick-look" reference only; they are based exclusively on original values, as published. No homogenization or corrections have been applied.
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CLASSIFICATIONS (TYPES, ATTRIBUTES) for NGC 2557 (Back to INDEX)
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FOREGROUND GALACTIC EXTINCTION for NGC 2557 (Back to INDEX)Galactic Extinction from the Schlafly & Finkbeiner 2011, Appendix; 2011ApJ...737..103S (SF11) recalibration
For completeness, we include the original SFD98 values:
Galactic Extinction based on H I Column Densities and Galaxy Counts (Burstein & Heiles; 1982AJ.....87.1165B) assuming Rv = 3.1: AB = 0.120 mag See Notes on Galactic Extinction for important caveats. |
BASIC DATA for NGC 2557 (Back to INDEX)Helio. Radial Velocity : 4865 +/- 21 km/s Redshift : 0.016228 +/- 0.000070 1991RC3.9.C...0000d Major Diameter (arcmin) : 1.18 Minor Diameter (arcmin) : 0.95 Magnitude and Filter : 13.7g Classifications : SB0 NOTE: This information is indicative only. With the exception of the |
QUANTITIES DERIVED FROM REDSHIFT for NGC 2557 (Details)(Back to INDEX)Calculated and Corrected Velocities V (Heliocentric) : 4865 +/- 21 km/s 1991RC3.9.C...0000d V (Kinematic LSR) : 4855 +/- 21 km/s 1986MNRAS.221.1023K V (Galactocentric GSR) : 4785 +/- 21 km/s 1991RC3.9.C...0000d V (Local Group) : 4764 +/- 22 km/s 1996AJ....111..794K V (3K CMB) : 5098 +/- 27 km/s 1996ApJ...473..576F V (Virgo Infall only) : 4906 +/- 24 km/s 2000ApJ...529..786M V (Virgo + GA only) : 5065 +/- 26 km/s 2000ApJ...529..786M V (Virgo + GA + Shapley) : 5092 +/- 27 km/s 2000ApJ...529..786M Hubble Flow Distance and Distance Modulus (where Ho = 73.0 +/- 5 km/sec/Mpc) D (Galactocentric GSR) : 65.5 +/- 4.6 Mpc (m-M) = 34.08 +/- 0.15 mag D (Local Group) : 65.3 +/- 4.6 Mpc (m-M) = 34.07 +/- 0.15 mag D (3K CMB) : 69.8 +/- 4.9 Mpc (m-M) = 34.22 +/- 0.15 mag D (Virgo Infall only) : 67.2 +/- 4.7 Mpc (m-M) = 34.14 +/- 0.15 mag D (Virgo + GA only) : 69.4 +/- 4.9 Mpc (m-M) = 34.21 +/- 0.15 mag D (Virgo + GA + Shapley) : 69.8 +/- 4.9 Mpc (m-M) = 34.22 +/- 0.15 mag Scale at Hubble Flow Distances Scale (Galactocentric GSR) : 318 pc/arcsec = 0.318 kpc/arcsec = 19.07 kpc/arcmin = 1.14 Mpc/degree Scale (Local Group) : 316 pc/arcsec = 0.316 kpc/arcsec = 18.98 kpc/arcmin = 1.14 Mpc/degree Scale (3K CMB) : 339 pc/arcsec = 0.339 kpc/arcsec = 20.32 kpc/arcmin = 1.22 Mpc/degree Scale (Virgo Infall only) : 326 pc/arcsec = 0.326 kpc/arcsec = 19.55 kpc/arcmin = 1.17 Mpc/degree Scale (Virgo + GA only) : 336 pc/arcsec = 0.336 kpc/arcsec = 20.18 kpc/arcmin = 1.21 Mpc/degree Scale(Virgo + GA + Shapley): 338 pc/arcsec = 0.338 kpc/arcsec = 20.29 kpc/arcmin = 1.22 Mpc/degree |
QUICK-LOOK PHOTOMETRY and LUMINOSITIES for NGC 2557 (Back to INDEX) The brightest flux in each of the following spectral regions, when available: Gamma-Ray (ν > 2E19 Hz); X-Ray (2E19 Hz > ν > 2E16 Hz); Ultraviolet (2E16 Hz > ν > 9E14 Hz); Visual (9E14 Hz > ν > 3E14 Hz); Near-Infrared (3E14 Hz > ν > 6E13 Hz); Mid-Infrared (6E13 Hz > ν > 7.5E12 Hz); Far-Infrared (7.5E12 Hz > ν > 1E12 Hz); Sub-Millimeter (1E12 Hz > ν > 3E11 Hz); Millimeter (3E11 Hz > ν > 3E10 Hz); Radio (3E10 Hz > ν).
a Metric Distance of (72.150 +/- 2.616) Mpc using the Average NED-D value. The quantities quoted above have not necessarily been corrected for foreground extinction, and no K-Corrections have been applied. View details and SED for 77 Photometric data point(s) available in NED. |
QUICK-LOOK ANGULAR & PHYSICAL DIAMETERS for NGC 2557 (Back to INDEX) The largest diameters in the Visual and Near-Infrared spectral regions, when available:
The quantities quoted above have not necessarily been corrected for foreground extinction. View details for 15 Diameter data point(s) available in NED. |