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Object IDs in DR1 differ from DR2 and later releases.

DR4: Object 179900721 (SMSS J172817.44-203529.4)

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Data releaseDR4
RA (deg)262.0727
Dec (deg)-20.5917
Galactic lon. (deg)4.9749
Galactic lat. (deg)7.7759
E(B-V) (SFD98) (mag)0.862
E(B-V) (GNILC) (mag)0.697 ± 0.034
Nearest DR4 source 179900718 (8.4 arcs away)
2nd-nearest DR4 source 1212979985 (8.5 arcs away)
3rd-nearest DR4 source 179900722 (9.5 arcs away)
Times observed28
Total bad pixels0
Observing flags3

Magnitudes

Filter u v g r i z
PSF mag. — — 19.154 ± 0.056 18.091 ± 0.073 17.392 ± 0.041 16.983 ± 0.035
Petrosian mag. — — 19.161 ± 0.043 18.068 ± 0.031 17.392 ± 0.027 17.019 ± 0.040

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 19.206 ± 0.049 0,0 100 2
g 20190506165109 19.137 ± 0.043 0,0 100 2
g 20190507143127 19.193 ± 0.066 0,0 100 2
g 20190822094124 19.192 ± 0.047 3,0 100 2
r 20140722114203 18.174 ± 0.130 512,0 5 2
r 20190505165926 18.098 ± 0.041 3,0 100 2
r 20190506165309 18.090 ± 0.039 3,0 100 2
r 20190507143327 18.143 ± 0.056 3,0 100 2
r 20190822094324 18.130 ± 0.039 3,0 100 2
i 20140719115004 17.290 ± 0.08 0,0 10 2
i 20140722114229 17.443 ± 0.084 0,0 10 2
i 20150901084153 17.366 ± 0.041 2,0 100 2
i 20160420172350 17.569 ± 0.112 0,0 10 2
i 20190505170526 17.327 ± 0.04 2,0 100 2
i 20190508164002 17.378 ± 0.052 3,0 100 2
i 20190509140533 17.34 ± 0.057 3,0 100 2
i 20190720124743 17.328 ± 0.066 3,0 100 2
i 20200513190610 17.338 ± 0.048 1,0 100 2
i 20210407183626 17.341 ± 0.091 0,0 10 2
z 20140719115035 17.019 ± 0.087 0,0 20 2
z 20140722114259 16.920 ± 0.068 0,0 20 2
z 20150901084353 16.925 ± 0.042 0,0 100 2
z 20160420172420 16.966 ± 0.081 0,0 20 2
z 20190505170726 16.940 ± 0.046 0,0 100 2
z 20190508164202 16.935 ± 0.049 0,0 100 2
z 20190509140733 16.932 ± 0.064 0,0 100 2
z 20190720124943 16.872 ± 0.065 3,0 100 2
z 20200513190811 16.992 ± 0.063 0,0 100 2
z 20210407183658 17.009 ± 0.094 0,0 20 2

Gaia DR3 data
Matching radius: 15"

Best match Second match
Distance (arcsec) 1.0 1.33
GAIA source ID 4121034039778339584 4121034044103011840
Bp mag. 19.199 --
G mag. 18.227 19.712
Rp mag. 17.211 --
Bp/Rp excess 1.369 --
Parallax (mas) 1.443 ± 0.196 -1.105 ± 0.684
PM RA (mas/yr) -5.353 ± 0.189 -4.572 ± 0.679
PM Dec (mas/yr) -13.527 ± 0.148 -6.961 ± 0.468
A.E.N. (mas) 0.0 ± 0.0 1.120 ± 1.116

UV to IR data
Matching radius: 2"

Filter Magnitude1
FUV -- ± --
NUV -- ± --
u -- ± --
g -- ± --
r 18.369 ± 0.003
i -- ± --
z -- ± --
Y -- ± --
J 15.737 ± 0.009
H -- ± --
K 14.908 ± 0.014
W1 14.479 ± 0.055
W2 14.541 ± 0.057
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.