Size and albedo of the largest detected Oort-cloud object: Comet C/2014 UN271 (Bernardinelli-Bernstein)

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Volume 659 (March 2022)

A&A, 659 (2022) L1

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Table 1.

Observation parameters.

Scheduling	UT date	Integration	Flux calibrator		Phase calibrator		2014 UN₂₇₁
block	(start/end)	time	and flux density ^(a)		and flux density ^(b)		Flux density ^(b)	(ΔRA, ΔDec) ^(c)
SB1	08-Aug-2021	1624 sec	J2258-2758	1.22 Jy	J0253-5411	0.374 Jy	0.109 ± 0.016 mJy	−0.091″ −0.249″
	7:37–8:35
SB2	08-Aug-2021	1613 sec	J0519-4546	1.26 Jy	J0253-5411	0.389 Jy	0.147 ± 0.016 mJy	−0.100″ −0.262″
	8:35–9:30

Notes.

^(a)

Assumed.

^(b)

Measured.

^(c)

(RA, Dec) offset with respect to predicted position. Adopting a mean (−0.0955″, −0.2555″) offset for the two SBs, the J2000 astrometric coordinates with respect to the observing site (Code −7) on August 8, 2021, UT = 8:00 are: RA = 02:42:04:2508 and Dec = −53:26:48.520.

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