Observer's guide
About NGC 4889
NGC 4889 (C35) is catalogued as a galaxy in Coma Berenices. Its J2000 position is RA 13:00:08, Dec +27:58:37, corresponding to 195.0337 degrees RA and 27.977 degrees Dec. The local catalogue places it about 300,000,000 light-years away. Its referenced angular extent is approximately 2.92 by 1.82 arcminutes.
Observing tips
This is rated as a very hard target at magnitude 11.4. It is associated with spring observing, with midnight placement typically strongest around April. From 52 degrees north its theoretical meridian altitude is about 66 degrees; local horizons and the live altitude chart determine the practical window.
Because it is faint, use a larger aperture where possible, avoid bright Moon conditions, and use averted vision.
What to expect
The SIMBAD classification for the matched source is EmG. SIMBAD records the morphology as E3. A published radial velocity value is 6376.3 km/s. The SIMBAD record currently connects it to 747 bibliographic references.
At roughly 2.9 arcminutes across, it benefits from a narrower field and adequate image scale. Use the listed 2.92 by 1.82 arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.