HD 41004
HD 41004 is a visual binary star system in the southern constellation of Pictor. It is too faint to be visible to the naked eye, having a combined apparent visual magnitude of 8.65. The two components have a magnitude difference of 3.7, and share a common proper motion with an angular separation of , as of 2018. The distance to this system is approximately 136 light years based on parallax. It is drifting further away from the Sun with a radial velocity of +42.5 km/s, having come to within some 831,000 years ago.

The primary, component A, is a K-type main-sequence star with a stellar classification of K1V and a visual magnitude of 8.82. Torres et al. (2006) classed it as a K1IV star, suggesting it is a subgiant star that is evolving off the main sequence. It has 89% of the mass of the Sun and 104% of the Sun's radius. The star is radiating 63% of the Sun's luminosity from its photosphere at an effective temperature of 5,255 K. Its smaller companion, designated component B, is a red dwarf with spectral type M2V and apparent magnitude 12.33. It has a projected separation of from the primary.
Q2088182
visual binary
CEL
Q595871
star system
Concept
Q8928
constellation
Concept
Q10486
Pictor
CEL
Q124313
apparent visual magnitude
Concept
Q5571730
common proper motion
UNK
Q1357788
angular separation
Concept
Q531
light year
Concept
Q906561
parallax
Concept
Q525
Sun
CEL
Q240105
radial velocity
Concept
Q863936
K-type main-sequence star
Concept
Q25377588
stellar classification
Concept
Q6227
subgiant star
Concept
Q6472
evolving
Concept
Q3450
main sequence
Concept
Q180892
mass of the Sun
Concept
Q48440
Sun's radius
Concept
Q843877
Sun's luminosity
Concept
Q6372
photosphere
Concept
Q854050
effective temperature
Concept
Q5893
red dwarf
Concept
Q5571730
projected separation
UNK
Q1193829
HD 41004
CEL
2018-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2018
DATE
+8.65^^http://www.w3.org/2001/XMLSchema#decimal
8.65
NUMBER
+3.7^^http://www.w3.org/2001/XMLSchema#decimal
3.7
NUMBER
++42.5^^http://www.w3.org/2001/XMLSchema#decimal
+42.5
NUMBER
+831.000^^http://www.w3.org/2001/XMLSchema#decimal
831,000
NUMBER
+1^^http://www.w3.org/2001/XMLSchema#decimal
1
NUMBER
+8.82^^http://www.w3.org/2001/XMLSchema#decimal
8.82
NUMBER
+2006^^http://www.w3.org/2001/XMLSchema#decimal
2006
NUMBER
+1^^http://www.w3.org/2001/XMLSchema#decimal
1
NUMBER
+89^^http://www.w3.org/2001/XMLSchema#decimal
89
NUMBER
+63^^http://www.w3.org/2001/XMLSchema#decimal
63
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+12.33^^http://www.w3.org/2001/XMLSchema#decimal
12.33
NUMBER
constellation
apparent magnitude
instance of
instance of