Table 4: Stellar parameters and predicted broadband photometry of AFGL 2298 in 2001 June and 2002 August, derived from comparison to NLTE synthetic spectra (see Sect. 3 for details). Note that both $v_{\exp}$ and the H/He abundance ratio cannot be determined directly from the present dataset and hence were set to values appropiate to high luminosity mid-B supergiants; note that solar Fe & Mg abundances are assumed.
Parameter 2001 2002

$v_{\exp}$ (km s^-1) 200 200

H/He 5 5

$T_{\rm eff}$ (kK) 12.5 15

log( $L_{\ast}/L_{\odot}$ ) 6.2 6.1

$R_{\ast}$ ( $R_{\odot}$ ) 260 165

log( $\dot{M}$ ) ( $M_{\odot}$ yr^-1) -4.3 -3.9

Photometry

R 25.4 25.8

I 18.9 19.3

J 13.4 13.7

H 9.8 10.0

K 7.9 7.9

L 6.1 5.9

**Table 4:** Stellar parameters and predicted broadband photometry of AFGL 2298 in 2001 June and 2002 August, derived from comparison to NLTE synthetic spectra (see Sect. 3 for details). Note that both $v_{\exp}$ and the H/He abundance ratio cannot be determined directly from the present dataset and hence were set to values appropiate to high luminosity mid-B supergiants; note that solar Fe & Mg abundances are assumed.
Parameter	2001	2002
$v_{\exp}$ (km s^-1)	200	200
H/He	5	5
$T_{\rm eff}$ (kK)	12.5	15
log( $L_{\ast}/L_{\odot}$ )	6.2	6.1
$R_{\ast}$ ( $R_{\odot}$ )	260	165
log( $\dot{M}$ ) ( $M_{\odot}$ yr^-1)	-4.3	-3.9
Photometry
R	25.4	25.8
I	18.9	19.3
J	13.4	13.7
H	9.8	10.0
K	7.9	7.9
L	6.1	5.9

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