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Object IDs in DR1 differ from DR2 and later releases.

DR4: Object 179821054 (SMSS J172715.98-204958.0)

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Data releaseDR4
RA (deg)261.8166
Dec (deg)-20.8328
Galactic lon. (deg)4.6391
Galactic lat. (deg)7.8457
E(B-V) (SFD98) (mag)0.983
E(B-V) (GNILC) (mag)0.861 ± 0.037
Nearest DR4 source 179821053 (5.3 arcs away)
2nd-nearest DR4 source 179821065 (10.6 arcs away)
3rd-nearest DR4 source 2268053140 (12.3 arcs away)
Times observed32
Total bad pixels0
Observing flags3

Magnitudes

Filter u v g r i z
PSF mag. — — 18.681 ± 0.054 17.897 ± 0.062 16.990 ± 0.035 16.509 ± 0.039
Petrosian mag. — — 18.531 ± 0.043 17.659 ± 0.061 16.639 ± 0.056 16.190 ± 0.028

2 x 2 arcmin

Image cutouts

See all image cutouts for this object here.
Images shown are the best images available from DR4, as determined by their coverage and approximate photometric zero-point.

Photometry measurements

Filter Image ID Magnitude (APC05) Flags Exp time (s) Image Quality
(1=best to 3)
g 20140729111106 18.762 ± 0.143 0,0 5 2
g 20190505165725 18.737 ± 0.034 1,0 100 2
g 20190506165109 18.706 ± 0.035 1,0 100 2
g 20190507143127 18.727 ± 0.034 1,0 100 2
r 20140722114203 17.994 ± 0.103 0,0 5 2
r 20140729111131 17.851 ± 0.086 0,0 5 2
r 20160420170109 17.627 ± 0.102 0,0 5 2
r 20190505165926 17.792 ± 0.034 1,0 100 2
r 20190506165309 17.814 ± 0.033 1,0 100 2
r 20190507143327 17.809 ± 0.038 3,0 100 2
i 20140719115004 17.056 ± 0.063 0,0 10 2
i 20140722114229 16.989 ± 0.058 0,0 10 2
i 20140729111202 16.926 ± 0.054 0,0 10 2
i 20150901084153 16.951 ± 0.035 3,0 100 2
i 20150901084554 16.971 ± 0.033 3,0 100 2
i 20160420170134 16.972 ± 0.065 0,0 10 2
i 20180605124636 17.074 ± 0.078 0,0 10 2
i 20190505170526 16.944 ± 0.034 3,0 100 2
i 20190508164002 16.991 ± 0.034 3,0 100 2
i 20190509140533 17.008 ± 0.051 1,0 100 2
i 20190720124743 17.006 ± 0.06 19,0 100 2
i 20200524153441 17.002 ± 0.073 0,0 10 2
z 20140719115035 16.516 ± 0.058 0,0 20 2
z 20140722114259 16.505 ± 0.050 0,0 20 2
z 20140729111235 16.557 ± 0.052 0,0 20 2
z 20150901084353 16.485 ± 0.038 3,0 100 2
z 20150901084754 16.524 ± 0.036 1,0 100 2
z 20160420170204 16.528 ± 0.057 0,0 20 2
z 20180605124707 16.500 ± 0.062 0,0 20 2
z 20190505170726 16.492 ± 0.036 1,0 100 2
z 20190508164202 16.546 ± 0.035 1,0 100 2
z 20190509140733 16.532 ± 0.055 1,0 100 2
z 20190720124943 16.577 ± 0.060 16,0 100 2
z 20200513183957 16.577 ± 0.044 1,0 100 2

Gaia DR3 data
Matching radius: 15"

Best match Second match
Distance (arcsec) 0.34 1.36
GAIA source ID 4121011327988681728 4121011332320171648
Bp mag. 18.804 --
G mag. 17.975 19.699
Rp mag. 16.841 --
Bp/Rp excess 1.534 --
Parallax (mas) 0.657 ± 0.119 1.428 ± 0.510
PM RA (mas/yr) -7.097 ± 0.147 -1.833 ± 0.642
PM Dec (mas/yr) -0.093 ± 0.104 0.594 ± 0.452
A.E.N. (mas) 0.0 ± 0.0 2.594 ± 8.615

UV to IR data
Matching radius: 2"

Filter Magnitude1
FUV -- ± --
NUV -- ± --
u -- ± --
g 19.052 ± 0.005
r 17.875 ± 0.002
i 17.220 ± 0.004
z 16.863 ± 0.004
Y -- ± --
J 15.441 ± 0.007
H -- ± --
K 14.692 ± 0.012
W1 14.189 ± 0.016
W2 14.436 ± 0.032
W3 -- ± --
W4 -- ± --
1Magnitude sources
FUV/NUV: AB mag (calibrated) from GALEX
ugriz: AB mag (Kron) from NOAO Source Catalog
YJHK: Vega mag from VISTA (2" aperture) or 2MASS PSC
W1-W4: Vega mag from CatWISE2020 or AllWISE (profile mag). No error value means the stated value is an upper limit.