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Object IDs in DR1 differ from DR2 and later releases.

DR4: Object 179900731 (SMSS J172818.55-203518.6)

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Data releaseDR4
RA (deg)262.0773
Dec (deg)-20.5886
Galactic lon. (deg)4.9799
Galactic lat. (deg)7.7739
E(B-V) (SFD98) (mag)0.862
E(B-V) (GNILC) (mag)0.697 ± 0.034
Nearest DR4 source 179900723 (8.0 arcs away)
2nd-nearest DR4 source 179900732 (8.8 arcs away)
3rd-nearest DR4 source 179900775 (10.9 arcs away)
Times observed16
Total bad pixels0
Observing flags1

Magnitudes

Filter u v g r i z
PSF mag. — — 19.774 ± 0.107 18.864 ± 0.022 18.213 ± 0.023 17.813 ± 0.022
Petrosian mag. — — 20.027 ± 0.226 18.831 ± 0.050 18.422 ± 0.075 18.111 ± 0.079

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 20190505165725 19.919 ± 0.082 0,0 100 2
g 20190506165109 19.647 ± 0.063 0,0 100 2
r 20190505165926 18.751 ± 0.058 0,0 100 2
r 20190506165309 18.720 ± 0.056 0,0 100 2
r 20190507143327 18.818 ± 0.075 1,0 100 2
r 20190822094324 18.893 ± 0.060 1,0 100 2
i 20150901084153 18.153 ± 0.065 0,0 100 2
i 20190505170526 18.139 ± 0.063 0,0 100 2
i 20190509140533 18.197 ± 0.079 0,0 100 2
i 20190720124743 18.183 ± 0.084 1,0 100 2
i 20200513190610 18.299 ± 0.094 0,0 100 2
z 20140722114259 17.819 ± 0.141 512,0 20 2
z 20150901084353 17.839 ± 0.082 0,0 100 2
z 20160420172420 17.654 ± 0.147 0,0 20 2
z 20190505170726 17.761 ± 0.08 0,0 100 2
z 20190509140733 17.840 ± 0.098 0,0 100 2
z 20190720124943 17.718 ± 0.089 0,0 100 2

Gaia DR3 data
Matching radius: 15"

Best match Second match
Distance (arcsec) 0.4 0.73
GAIA source ID 4121034074140839552 4121034078500596096
Bp mag. -- 19.793
G mag. 20.087 19.567
Rp mag. -- 17.810
Bp/Rp excess -- 2.713
Parallax (mas) -- ± -- 0.203 ± 0.588
PM RA (mas/yr) -- ± -- -6.137 ± 0.605
PM Dec (mas/yr) -- ± -- -4.165 ± 0.445
A.E.N. (mas) 0.0 ± 0.0 0.0 ± 0.0

UV to IR data
Matching radius: 2"

Filter Magnitude1
FUV -- ± --
NUV -- ± --
u -- ± --
g -- ± --
r 18.673 ± 0.005
i -- ± --
z -- ± --
Y -- ± --
J 17.075 ± 0.029
H -- ± --
K -- ± --
W1 -- ± --
W2 -- ± --
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.