UGC 4055
ILLUSTRATION FROM HUBBLE TYPE SB · MAJOR AXIS 0.942′ · AXIS RATIO 0.70 · POSITION ANGLE 120°
OVERVIEW
GALAXYUGC 4055 is a barred spiral galaxy SB in the constellation Gemini, 211.6 from Earth, shining at apparent magnitude 15.06 (). Other catalogues list it as 2MASX 07510799+3403226, PGC 21983 and WISExSCOS J075108.03+340322.9.
- WHAT IT IS
- Barred spiral galaxy
- HOW FAR
- 211.6
- HOW BIG ON THE SKY
- 56
- HOW BRIGHT (B)
A luminosity distance, from its redshift — how faint it looks. The light itself left 215 million years ago.
Small enough that the full Moon would cover it several times over.
Faint: it takes a large telescope.
THE MODEL
LIGHT ALONG THE RAYCALCULATED · NOT AN OBSERVATION · ANGULAR SIZE AT THE CATALOGUED DISTANCE · HUBBLE TYPE SB · MAJOR AXIS 0.942′ · AXIS RATIO 0.70 · POSITION ANGLE 120° · NO SURFACE — DRAWN AS A VOLUME · AXIS RATIO READ AS AN INCLINATION
The same disc, with the bar its classification records across the middle and the arms starting from the bar's ends rather than from the centre. The shape of it is the catalogued morphology; the tilt is the catalogued axis ratio read as an inclination, which is what a round disc's axis ratio is. Nothing measured the depth — a disc that looks this elliptical from the Sun is this far over, and the model is that disc seen from wherever you turn it to. The two colours are two populations: old stars in the bulge and the disc, young ones in the arms, both through the same blackbody table as the star pages. Drag it, or use the arrow keys, to look from another direction. The stars behind are the 498,631 this catalogue holds real distances for, drawn from where the camera actually is — but every one of them is within 170 parsecs of the Sun and this object is much further out, so from here that whole neighbourhood is a knot in one direction and the rest of the sky is empty. The view you land on looks the other way; turn back towards the Sun and the stars come with it. What the readout says is which of the two the frame is pointed at. The emptiness is not a missing backdrop — it is the edge of what this catalogue has measured.
OBSERVING
FROM WHERE YOU AREWhat it takes to see UGC 4055 for yourself. Everything in this part of the page is worked out for a real horizon, a real night and the equipment you say you have.
Say where you are, and this line says when UGC 4055 is worth going out for.
THROUGH AN EYEPIECE
150 MM TELESCOPE · 25 MM EYEPIECEFainter than the largest telescope modelled here reaches. UGC 4055 covers 56″ of sky against a of 1.08°, so at 48× it is a speck in a wide field.
- 48×
- 1.08
- 1.25
- 13.0
- SIZE ON THE SKY
- 56
- FILLS OF THE FIELD
- 1% of the width
- APPARENT MAGNITUDE ()
- 15.06 · too faint for this
UGC 4055 is not a point of light, so the limit above is the wrong one to hold it against: the same brightness spread over 56″ of sky is harder than a star of it, and goes first. Catalogued sizes are measured to a photographic contour, and the part an eye sees is usually smaller.
APPARENT PLACE
EQUINOX J2026.8Where a telescope has to be pointed today, which is not quite where the catalogue records the object: the coordinate grid itself has turned since the year 2000 the catalogue is referred to.
- RIGHT ASCENSION
- DECLINATION
- GRID TURNED SINCE
- 22.1
- PROPER MOTION SINCE
- none published
Computed for 2026-10-23 00:00 UT. No proper motion is published for UGC 4055, so nothing here moves the object; what separates this from the catalogued position above is the coordinate grid turning under it — about fifty arcseconds a year of precession since 2000, and the small nodding of the Earth’s axis on top of that. The catalogue it came from publishes no error for that position, so nothing here says how far this arithmetic can be trusted — the digits above are as precise as the place they were computed from, and no more. Aberration, parallax and refraction are left out. Aberration swings every position by up to twenty arcseconds over a year; parallax stays under an arcsecond for all but the nearest stars; refraction is nothing overhead and about half a degree at the horizon, where it answers to the air, not the sky. The same figure for any date.
SPECTRUM
ITS OWN LIGHTA galaxy's spectrum is every star in it added together, so the gaps are the ones its commonest stars make. Where a line comes back as a spike instead, gas somewhere in the galaxy is being lit hard enough to glow on its own.
Point at a labelled line — or an element above — to see which atom makes it and where it falls.
- SHIFTED Every line above sits 1.6% redder than the wavelength its atom emits at, because UGC 4055 is receding. The pattern survives it — the whole barcode slides together, which is how the shift is measured in the first place.
SDSS DR18 optical spectra — Sloan Digital Sky Survey, www.sdss.org · spec-0756-52577-0153 · observed 2002-10-30. SDSS fibre, 3 arcseconds across. Resolving power R = 1,500 to 2,500; 3,837 reduced pixels rebinned onto 1,024 log-spaced display points and normalised to the median flux. Brightness is scaled to this spectrum’s own middle value, so the shape is the measurement and the height is not. The 8 lines named above are the ones that stand clear of the scatter and of the features around them; a spectrum at this sampling holds many more that it cannot separate. The samples themselves, as JSON, CSV or VOTable.
CATALOG DATA
12 FIELDSThe raw catalogue values, as the source published them, with the error bars where one was published — sorted by what each set of figures is about rather than by the order they happened to be stored in.
WHAT KIND OF THING IT IS
What the object is in itself, rather than how it happens to look from here.
- Hubble type
- Stellar mass
- 6.54×10⁸ ±3.7×10⁸
HOW BRIGHT IT IS
What the light adds up to, measured through one filter at a time. A magnitude is a brightness on a backwards scale — the smaller the number, the brighter the object.
- Apparent magnitude ()
- Apparent magnitude ()
- Apparent magnitude ( band)
- Apparent magnitude ()
WHERE IT IS AND HOW IT MOVES
Position, motion across the sky and the size it covers on it. These are measurements of the object as seen from here, so every one of them depends on where here is.
- Redshift (z)
- Redshift (z, CMB frame)
- Major axis
- 0.941643
- Minor axis
- 0.661034
- 120
WHERE THESE FIGURES CAME FROM
Which catalogue, paper or model each of the fields above was read from, where the source named one.
- Morphology from
- SIMBAD (2019MNRAS.488..590B, quality C)
ALSO KNOWN AS
3 DESIGNATIONS- 2MASX 2MASX 07510799+3403226
- PGC PGC 21983
- WISExSCOS WISExSCOS J075108.03+340322.9
LOOK IT UP ELSEWHERE
4 SERVICESEach link carries the identifier printed beside it. Nothing on this page is a measurement of our own, so a number that disagrees with one of these is worth reporting — and a service that has never catalogued this object under this name will say so plainly.
- SIMBADUGC 4055
Cross-identifications, measured values and the reference behind each of them.
- NEDUGC 4055
Redshift-independent distances, photometry across the spectrum and the extragalactic literature.
- ADSobject:"UGC 4055"
Papers indexed against this object rather than against the string, newest first.
- VizieR28″ around 117.7833 +34.0563
Every published table with a row at this position, searched by coordinates rather than by name.
CITE THIS PAGE
DR1This page is live and its numbers move when an upstream refreshes, so the citation names the release the rows belong to rather than the day you read them. The release itself is frozen, republished as a bundle, and is what a data-availability statement should point at.
SpaceCatalog. UGC 4055 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ugc-4055
@misc{spacecatalog_ugc-4055,
author = {{SpaceCatalog}},
title = {{UGC 4055}},
howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
year = {2026},
url = {https://spacecatalog.org/object/ugc-4055},
note = {Catalogue entry, data release DR1 (2026-08-21). Values from GLADE+ (Galaxy List for the Advanced Detector Era).}
}The values above were taken from GLADE+ (Galaxy List for the Advanced Detector Era) — VizieR terms; cite Dalya+ 2022 (2022MNRAS.514.1403D). Citing this page does not replace citing that catalogue.
That catalogue asks for this acknowledgement: Dálya et al. 2022, MNRAS 514, 1403 (2022MNRAS.514.1403D) — "Please cite this paper when using GLADE+ data" — via VizieR VII/291. This research has made use of the VizieR catalogue access tool, CDS, Strasbourg, France (DOI: 10.26093/cds/vizier). The original description of the VizieR service was published in 2000, A&AS 143, 23.