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Object IDs in DR1 differ from DR2 and later releases.

DR4: Object 179900648 (SMSS J172818.92-203644.9)

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Data releaseDR4
RA (deg)262.0790
Dec (deg)-20.6124
Galactic lon. (deg)4.9605
Galactic lat. (deg)7.7596
E(B-V) (SFD98) (mag)0.862
E(B-V) (GNILC) (mag)0.742 ± 0.036
Nearest DR4 source 179900599 (5.9 arcs away)
2nd-nearest DR4 source 179900641 (7.5 arcs away)
3rd-nearest DR4 source 179900649 (13.5 arcs away)
Times observed14
Total bad pixels0
Observing flags3

Magnitudes

Filter u v g r i z
PSF mag. 19.584 ± 0.134 18.829 ± 0.120 17.998 ± 0.098 17.549 ± 0.079
Petrosian mag. 19.492 ± 0.101 18.455 ± 0.139 17.556 ± 0.101 17.184 ± 0.117

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 19.704 ± 0.070 3,0 100 2
g 20190506165109 19.706 ± 0.067 1,0 100 2
r 20190506165309 18.791 ± 0.058 1,0 100 2
r 20190507143327 18.980 ± 0.083 3,0 100 2
i 20150901084153 18.069 ± 0.061 1,0 100 2
i 20190505170526 18.086 ± 0.060 1,0 100 2
i 20190509140533 18.030 ± 0.073 1,0 100 2
i 20200513190610 18.210 ± 0.088 1,0 100 2
z 20150901084353 17.756 ± 0.076 0,0 100 2
z 20160420172420 17.534 ± 0.132 0,0 20 2
z 20190505170726 17.544 ± 0.068 1,0 100 2
z 20190508164202 17.765 ± 0.091 1,0 100 2
z 20190509140733 17.798 ± 0.096 1,0 100 2
z 20190720124943 17.652 ± 0.086 1,0 100 2

Gaia DR3 data
Matching radius: 15"

Best match Second match
Distance (arcsec) 0.76 0.97
GAIA source ID 4121022293084224384 4121022288762954752
Bp mag. -- 19.648
G mag. 20.670 18.813
Rp mag. -- 17.85
Bp/Rp excess -- 1.358
Parallax (mas) -- ± -- 0.346 ± 0.308
PM RA (mas/yr) -- ± -- -4.216 ± 0.295
PM Dec (mas/yr) -- ± -- -3.753 ± 0.232
A.E.N. (mas) 2.884 ± 1.222 0.0 ± 0.0

UV to IR data
Matching radius: 2"

Filter Magnitude1
FUV -- ± --
NUV -- ± --
u -- ± --
g -- ± --
r 18.051 ± 0.017
i -- ± --
z -- ± --
Y -- ± --
J 18.079 ± 0.073
H -- ± --
K 17.305 ± 0.124
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.