Hale-Bopp Unusual Observations

Synthesis of unusual observations for the Comet C/1995 O1 (Hale-Bopp). Comments of observation's author.

• Discovered: July 23, 1995 by A. Hale, NM, and T. Bopp, AZ, Amateur Astronomers
• Identified: on a 1993 April 27 photo (UK Schmidt Telescope at Siding Spring, Australia)
• Earth Closest Approach: March 22, 1997 (1.315 AU)
• Sun Closest Approach: April 1, 1997 (0.914 AU)
• Estimated Nucleus Size: 40 to 70 Km
• Estimated Nucleus Rotation: 11.34 +/- 0.03 hours
• Detected Molecules: H₂O, HDO, OH, H₂O⁺, H₃O⁺, CO, CO₂, CO⁺, HCO⁺, H₂S, SO, SO₂, H₂CS, OCS, CS, CH₃OH, H₂CO, HCOOH, CH₃OCHO, HCN, DCN, CH₃CN, HNC, HC₃N, HNCO, CN, NH₃, NH₂, NH₂CHO, NH, CH₄, C₂H₂, C₂H₆, C₃, C₂, Na, K, O⁺. Isotopes: H¹³CN, HC¹⁵N, C³⁴S.
• Molecular Production Rates: Institut de Radio Astronomie Millimetrique (IRAM)
• Light Curve: Mark Kidger (IAC)
• 3-D Orbit View in the Solar System: Skypub
• Orbit and Ephemeris: IAU
• Some of the Best Images: UH Institute for Astronomy
• Images Archive: Ron Baalke (JPL)
• Recommended Links: Pic du Midi Observatory , Haute-Provence Observatory , Limber Observatory , Ian Griffin (AMPO)

1998 to present Unusual Observations Synthesis

1997 Unusual Observations Synthesis

• 1997 April - December

• 1997 March

• 1997 January - February

1996 Unusual Observations Synthesis

1995 Unusual Observations Synthesis