C/2009 O4 (Hill)
- Capture date
- 2009-08-29
- Nearest MPC J01 observation
- No dated J01 record is available in the local MPC cache.
- Distance to the Sun
- 2.887040 AU (431,894,996 km)
- Distance to the Earth
- 1.943415 AU (290,730,687 km)
- Approximate magnitude
- ≈ 16.0 (comet total; Horizons model estimate)

Open original-resolution image
- Source filename
- c2009o4.jpg
- Image dimensions
- 730 × 610
About this object
- Designation
- C/2009 O4
- Orbit class
- Hyperbolic Comet
Orbital parameters: Epoch 2455077.5 JD TDB · q = 2.56 au · e = 1 · i = 95.8 deg · Ω = 173 deg · ω = 224 deg · T = 2455197.776 JD TDB