19 Puppis
19 Puppis is a binary star system in the southern constellation of Puppis, near the northern border with Hydra and Monoceros. It is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of 4.72. The system is located approximately 177 light years away from the system based on parallax. It is receding from the Earth with a heliocentric radial velocity of +36 km/s, having come to within some 1.4 million years ago.

The primary, component A, is an aging giant star with a stellar classification of G9III-IIIb. It is a red clump giant, which indicates it is on the horizontal branch and is generating energy through helium fusion at its core. The star is about one billion years old with 1.05 times the mass of the Sun and 8.9 times the Sun's radius. It is radiating 43 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,750 K.

The secondary member, component B, is a magnitude 11.2 star at an angular separation of from the primary. Four visual companions have been reported. These are component C, at magnitude 13.2 and separation 30.7", D, at magnitude 8.9 and separation 57.8", E, at magnitude 9.37 and separation 70.1", and F, at magnitude 10.74 and separation 114.1".
Q50053
binary star
Concept
Q8928
constellation
Concept
Q9251
Puppis
CEL
Q10578
Hydra
CEL
Q10428
Monoceros
CEL
Q124313
apparent visual magnitude
Concept
Q531
light year
Concept
Q240105
radial velocity
Concept
Q5875
giant star
Concept
Q25377588
stellar classification
Concept
Q1358411
red clump
Concept
Q50076
horizontal branch
Concept
Q336225
helium fusion
Concept
Q60790215
core
Concept
Q180892
mass of the Sun
Concept
Q48440
Sun's radius
Concept
Q843877
luminosity of the Sun
Concept
Q6372
photosphere
Concept
Q854050
effective temperature
Concept
Q1357788
angular separation
Concept
Q13890
visual companion
Concept
Q1049627
19 Puppis
CEL
+19^^http://www.w3.org/2001/XMLSchema#decimal
19
NUMBER
+4.72^^http://www.w3.org/2001/XMLSchema#decimal
4.72
NUMBER
++36^^http://www.w3.org/2001/XMLSchema#decimal
+36
NUMBER
+1.4^^http://www.w3.org/2001/XMLSchema#decimal
1.4
NUMBER
+9^^http://www.w3.org/2001/XMLSchema#decimal
9
NUMBER
+1.05^^http://www.w3.org/2001/XMLSchema#decimal
1.05
NUMBER
+8.9^^http://www.w3.org/2001/XMLSchema#decimal
8.9
NUMBER
+43^^http://www.w3.org/2001/XMLSchema#decimal
43
NUMBER
+11.2^^http://www.w3.org/2001/XMLSchema#decimal
11.2
NUMBER
+13.2^^http://www.w3.org/2001/XMLSchema#decimal
13.2
NUMBER
+30.7^^http://www.w3.org/2001/XMLSchema#decimal
30.7
NUMBER
+8.9^^http://www.w3.org/2001/XMLSchema#decimal
8.9
NUMBER
+57.8^^http://www.w3.org/2001/XMLSchema#decimal
57.8
NUMBER
+9.37^^http://www.w3.org/2001/XMLSchema#decimal
9.37
NUMBER
+70.1^^http://www.w3.org/2001/XMLSchema#decimal
70.1
NUMBER
+10.74^^http://www.w3.org/2001/XMLSchema#decimal
10.74
NUMBER
+114.1^^http://www.w3.org/2001/XMLSchema#decimal
114.1
NUMBER
constellation
apparent magnitude
mass
instance of
instance of