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Table 1

Positions (J2000), proper motions [mas/yr], photometry [mag], spectral indices/types, distances [pc], and tangential velocities [km s-1].

Param. J0521+1025 J0457−0207 J2030+0749
LBT α 05 21 26.349 04 57 46.114 20 30 42.897
LBT δ +10 25 27.41 −02 07 19.59 +07 49 34.44
LBT ep 2012.773 2012.770 2012.855
WISE α 05 21 26.2967 04 57 46.0884 20 30 42.7986
WISE δ +10 25 28.494 −02 07 19.239 +07 49 34.741
WISE ep 2010.175 2010.156 2010.332
WISEcα 05 21 26.3165 04 57 46.1024 20 30 42.8069
WISEcδ +10 25 28.439 −02 07 19.186 +07 49 34.602
WISEc ep 2010.701 2010.682 2010.830
GCSbα n/a 04 57 46.0785 n/a
GCSbδ n/a −02 07 19.202 n/a
GCS ep n/a 2010.019 n/a
SDSS α n/a n/a 20 30 42.357
SDSS δ n/a n/a +07 49 35.64
SDSS ep n/a n/a 2000.748
2MASS α 05 21 26.147a 04 57 46.022 20 30 42.357
2MASS δ +10 25 32.74a −02 07 17.95 +07 49 35.83
2MASS ep 2000.118 1998.707 2000.444
DENIS α n/a 04 57 46.038 n/a
DENIS δ n/a −02 07 18.34 n/a
DENIS ep n/a 1998.953 n/a
SSS Iα n/d n/d 20 30 42.149
SSS Iδ n/d n/d +07 49 36.18
SSS I ep 1995.874 2001.862 1995.654
SSS Ifα n/a n/a 20 30 42.051
SSS Ifδ n/a n/a +07 49 37.35
SSS If ep n/a n/a 1993.545
μαcosδ +232   ±   9 +82   ±   9 +653   ±   6
μ δ −418   ±   6 −97   ±   8 −138   ±   16
SSS I n/d n/d ~19.5
SSS If n/a n/a ~18.9   ±   0.3
SDSS i n/a n/a 21.810   ±   0.140
SDSS z n/a n/a 17.195   ±   0.014
DENIS J n/a 14.879   ±   0.12 n/a
2MASS J 15.262d 14.897   ±   0.040 14.227   ±   0.029
2MASS H 15.222   ±   0.103 14.198   ±   0.046 13.435   ±   0.033
2MASS Ks 14.665d 14.022   ±   0.055 13.319   ±   0.039
GCS He n/a 14.190   ±   0.003 n/a
GCS Ke n/a 13.975   ±   0.003 n/a
WISE w1 14.098   ±   0.031 13.391   ±   0.026 12.956   ±   0.025
WISE w2 12.286   ±   0.026 12.443   ±   0.025 12.122   ±   0.025
WISE w3 10.306   ±   0.085 11.020   ±   0.114 10.964   ±   0.110
H2O-H 0.246 (T7) 0.509 (T2) 0.599 (T0/T1)
CH4-H 0.155 (T7/T8) 0.798 (T2/T3) 0.859 (T2)
CH4-K 0.084 (T7/T8) 0.488 (T3) 0.595 (T2)
SpTvis T7.5 T2 T1.5
SpTadopt T7.5 T2 T1.5
d 5.0   ±   1.3 12.5   ±   3.1 10.5   ±   2.6
v tan 11   ±   3 8   ±   2 33   ±   8

Notes. Basic WISE data are from the All-Sky source catalogue, SDSS data from DR8 (Aihara et al. 2011). For other data references, see text (n/a – not available, n/d – not detected).

(a)

Visual measurement in 2MASS FITS image,

(b)

mean coordinates from four measurements at one epoch,

(c)

WISE 3-band cryo source working database or mean of Post-Cryo Single Exposure (L1b) data (for J2030+0749),

(d)

2MASS image deblended in this band,

(e)

mean GCS aperMag3 magnitudes from two measurements,

(f)

mean from two additional epochs – 1993.533+1993.557.

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