C/1490 Y1
| Discovery | |
|---|---|
| Discovery site | China |
| Discovery date | 31 December 1490 |
| Designations | |
| 1491 I | |
| Orbital characteristics | |
| Epoch | 26 December 1490 (JD 2265638.47) |
| Observation arc | 22 days |
| Number of observations | 3 |
| Aphelion | (Lee et al.) 5.32 AU; (JPL) not defined |
| Perihelion | (Lee et al.) 0.769 AU; (JPL) 0.738 AU |
| Semi-major axis | (Lee et al.) 3.040 AU; (JPL) not defined |
| Eccentricity | (Lee et al.) 0.75; (JPL) 1.0 |
| Orbital period | (Lee et al.) 5.30 years; (JPL) not defined |
| Inclination | (Lee et al.) 70.2°; (JPL) 51.6° |
| (Lee et al.) 283°; (JPL) 296° | |
| Argument of periapsis | (Lee et al.) 164°; (JPL) 130° |
| Last perihelion | 24 December 1490 (observed) |
| Next perihelion | Uncertain (Presumed periodic) |
| Physical characteristics | |
| 5.4 (1491 apparition) | |
C/1490 Y1 is a comet that was recorded and observed across East Asia, particularly China and Korea, from December 1490 to February 1491. It is believed to be the parent body of the Quadrantids meteor shower.