Earth, Planets and Space

Table 4 Photometry of Antares

From: Performance of Akatsuki/IR2 in Venus orbit: the first year

Filter (μm)	IR2 (September 8, 2016)					2MASS catalog			IR2/2MASS ratio
Filter (μm)	N ^a	r ^a	Mean^c	σ^c	Flux^d	Magnitude	Flux^d	Est.^d	IR2/2MASS ratio
1.735	5	6	0.521	0.04	0.0205	− 3.725 (H)	0.0352	0.0326	0.63
2.26	5	4	0.228	0.03	0.0090	− 4.100 (Ks)	0.0173	0.0137	0.66
2.32	5	4	0.156	0.02	0.0062			0.0115	0.54
2.02	1	4	0.338	–	0.0133			0.0223	0.60

H-band of 2MASS is 1.662 (μm), and Ks-band is 2.159 (μm)
^aNumber of Antares images with the filter
^aRadius of aperture used in photometry (pixels)
^cUnits are (W m⁻² sr⁻¹ μm⁻¹)
^dUnits are (W m⁻² m⁻¹)

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