Program: GN-2019B-Q-216

CK Vul, also known as Nova 1670 Vul, is the oldest and the closest representative of "red novae", identified with stellar mergers. A compact optical nebula was recovered at the position of the object in late 80-s. Deeper observations revealed a bipolar nebula with the previously discovered nebulosity in its waist. Its expansion confirmed that the nebula originated in the 1670 outburst. Submillimeter observations revealed another, smaller, bipolar structure, and inclined with respect to the optical nebula, and a dusty disc around the obscured central source. CH3OH molecule traces a S-shaped precessing jet which originates at the centre of the disc. This suggested ongoing mass loss and precession of the outflow. The kinematical age of the molecular nebula is not known, although it is aligned with the compact optical nebula. Gemini observed CK Vul in Halpha in 2010. We request a new Halpha image of CK Vul. We will study the expansion of the compact optical nebula, determine its age and the timescale of the precession using 2010 image as a reference. This will reveal the evolution of the star and the circumstellar envelope after the merger and the shaping mechanism of the nebula.