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Table 1.

Journal of the 2I observations.

UT Date Facility rh Δ α χ§ Standard
2019 [au] [au] [deg]
Sep 19 IRTF 2.67 3.26 15.78 1.95 HD 283886
Sep 24 Gemini 2.60 3.16 16.77 2.15 SAO 79667
Oct 09 IRTF 2.41 2.84 19.78 1.77 HD 87680



rh and Δ are the heliocentric and geocentric distances, respectively;


α is the phase angle;


χ is the airmass.

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