Observer's guide
About Rosette Nebula
Rosette Nebula (C49) is catalogued as an emission nebula in Monoceros. Its J2000 position is RA 06:33:45, Dec +04:59:00, corresponding to 97.6504 degrees RA and 4.9807 degrees Dec. The local catalogue places it about 4,900 light-years away. No consistent angular diameter is available in the source record.
Observing tips
This is rated as a hard target at magnitude 9. It is associated with winter observing, with midnight placement typically strongest around December. From 52 degrees north its theoretical meridian altitude is about 43 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 Cl*. A published radial velocity value is 37.6 km/s. The SIMBAD record currently connects it to 75 bibliographic references.
Confirm the framing in the live sky atlas before choosing a field of view. Use the listed unknown arcminute extent to check framing, and treat catalogue magnitude as integrated brightness rather than a direct measure of visual contrast.