Praea Euq QY-Y b14-4 [#9470537508481]
Praea Euq QY-Y b14-4 A
/ M (Red dwarf) Star
(Scoopable)
Distance to arrival:
0 ls
Estimated value:
1,207 cr
Solar masses:
0.3789
Solar radius:
0.5022
Age:
5,104 million years
Luminosity:
Va
Surface temperature:
2,919 K
Praea Euq QY-Y b14-4 A A Belt
Class:
Rocky
Mass:
85,229,000,000,000 Mt
Inner radius:
570,980 km
Outer radius:
1,746,100 km
Praea Euq QY-Y b14-4 A 1
/ High metal content world
(Landable)
Distance to arrival:
14 ls
Estimated value:
13,283 cr
Earth masses:
0.1293
Radius:
3,232 km
Gravity:
0.50 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
661 K
Materials:
Fe
(22.3%)
Ni
(16.9%)
S
(15.9%)
C
(13.4%)
Mn
(9.2%)
P
(8.6%)
V
(5.5%)
Ge
(4.7%)
Sn
(1.5%)
Te
(1.2%)
Hg
(1.0%)
Praea Euq QY-Y b14-4 A 1 a
/ Rocky body
(Landable)
Distance to arrival:
14 ls
Estimated value:
500 cr
Earth masses:
0.0011
Radius:
707 km
Gravity:
0.09 G
Volcanism:
Major Silicate Vapour Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
661 K
Materials:
Fe
(19.9%)
S
(17.9%)
Ni
(15.0%)
C
(15.0%)
P
(9.6%)
Mn
(8.2%)
Zn
(5.4%)
V
(4.9%)
Cd
(1.5%)
Nb
(1.4%)
Sb
(1.1%)
Praea Euq QY-Y b14-4 A 2
/ High metal content world
(Landable)
Distance to arrival:
19 ls
Estimated value:
13,103 cr
Earth masses:
0.1002
Radius:
2,977 km
Gravity:
0.46 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
581 K
Materials:
Fe
(21.0%)
Ni
(15.9%)
S
(14.9%)
C
(12.5%)
Cr
(9.4%)
Mn
(8.7%)
P
(8.0%)
Zn
(5.7%)
Cd
(1.6%)
W
(1.2%)
Te
(1.1%)
Praea Euq QY-Y b14-4 A 2 a
/ Rocky body
(Landable)
Distance to arrival:
19 ls
Estimated value:
500 cr
Earth masses:
0.0010
Radius:
704 km
Gravity:
0.09 G
Volcanism:
Major Silicate Vapour Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
581 K
Materials:
Fe
(21.2%)
S
(19.0%)
Ni
(16.0%)
C
(16.0%)
P
(10.2%)
Mn
(8.8%)
Se
(3.0%)
As
(2.5%)
Nb
(1.5%)
W
(1.2%)
Tc
(0.8%)
Praea Euq QY-Y b14-4 A 3
/ High metal content world
(Landable)
Distance to arrival:
26 ls
Estimated value:
12,408 cr
Earth masses:
0.0326
Radius:
2,076 km
Gravity:
0.31 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
519 K
Materials:
Fe
(21.3%)
Ni
(16.1%)
S
(15.2%)
C
(12.8%)
Cr
(9.6%)
Mn
(8.8%)
P
(8.2%)
Ge
(4.5%)
Mo
(1.4%)
Sn
(1.4%)
Tc
(0.8%)
Praea Euq QY-Y b14-4 A 4
/ High metal content world
(Landable)
Distance to arrival:
36 ls
Estimated value:
12,560 cr
Earth masses:
0.0425
Radius:
2,264 km
Gravity:
0.34 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
459 K
Materials:
Fe
(20.9%)
Ni
(15.8%)
S
(14.9%)
C
(12.5%)
Cr
(9.4%)
Mn
(8.6%)
P
(8.0%)
Zn
(5.7%)
Cd
(1.6%)
Nb
(1.4%)
Te
(1.1%)
Praea Euq QY-Y b14-4 A 5
/ High metal content world
(Landable)
Distance to arrival:
45 ls
Estimated value:
12,559 cr
Earth masses:
0.0425
Radius:
2,263 km
Gravity:
0.34 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
425 K
Materials:
Fe
(21.3%)
Ni
(16.1%)
S
(15.2%)
C
(12.8%)
Cr
(9.6%)
Mn
(8.8%)
P
(8.2%)
Ge
(4.5%)
Nb
(1.5%)
Te
(1.2%)
Hg
(0.9%)
Praea Euq QY-Y b14-4 AB 2
/ Class II gas giant
Distance to arrival:
1,133 ls
Estimated value:
30,705 cr
Earth masses:
849.3459
Radius:
77,671 km
Reserve level:
Pristine
Gravity:
5.73 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
215 K
Praea Euq QY-Y b14-4 AB 2 a
/ Icy body
(Landable)
Distance to arrival:
1,135 ls
Estimated value:
500 cr
Earth masses:
0.0112
Radius:
1,960 km
Gravity:
0.12 G
Volcanism:
Water Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
95 K
Materials:
S
(27.0%)
C
(22.7%)
P
(14.6%)
Fe
(12.1%)
Ni
(9.1%)
Mn
(5.0%)
Ge
(3.5%)
Zn
(3.3%)
Cd
(0.9%)
Te
(0.9%)
Nb
(0.8%)
Praea Euq QY-Y b14-4 AB 2 b
/ Icy body
(Landable)
Distance to arrival:
1,137 ls
Estimated value:
500 cr
Earth masses:
0.0152
Radius:
2,166 km
Gravity:
0.13 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
90 K
Materials:
S
(27.2%)
C
(22.9%)
P
(14.7%)
Fe
(12.2%)
Ni
(9.2%)
Cr
(5.5%)
Se
(4.3%)
As
(1.6%)
Cd
(0.9%)
Nb
(0.8%)
Ru
(0.8%)
Praea Euq QY-Y b14-4 AB 3
/ Class I gas giant
Distance to arrival:
1,111 ls
Estimated value:
2,807 cr
Earth masses:
2.7902
Radius:
18,616 km
Reserve level:
Pristine
Gravity:
0.33 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
84 K
Praea Euq QY-Y b14-4 AB 5
/ Class II gas giant
Distance to arrival:
1,737 ls
Estimated value:
30,436 cr
Earth masses:
796.3504
Radius:
77,273 km
Reserve level:
Pristine
Gravity:
5.43 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
184 K
Praea Euq QY-Y b14-4 AB 5 a
/ Icy body
(Landable)
Distance to arrival:
1,736 ls
Estimated value:
500 cr
Earth masses:
0.0116
Radius:
1,982 km
Gravity:
0.12 G
Volcanism:
Major Water Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
78 K
Materials:
S
(28.0%)
C
(23.5%)
P
(15.1%)
Fe
(12.5%)
Ni
(9.5%)
Se
(4.4%)
Zn
(3.4%)
As
(1.6%)
Sn
(0.8%)
Y
(0.8%)
W
(0.7%)
Praea Euq QY-Y b14-4 AB 5 b
/ Icy body
Distance to arrival:
1,739 ls
Estimated value:
500 cr
Earth masses:
0.0141
Radius:
2,107 km
Surface pressure:
61.47 Atmospheres
Gravity:
0.13 G
Volcanism:
No volcanism
Atmosphere:
Thick Carbon dioxide-rich
Terraforming state:
Not terraformable
Surface temperature:
229 K
Praea Euq QY-Y b14-4 AB 5 b a
/ Icy body
Distance to arrival:
1,739 ls
Estimated value:
500 cr
Earth masses:
0.0003
Radius:
628 km
Surface pressure:
6.30 Atmospheres
Gravity:
0.03 G
Volcanism:
Water Geysers
Atmosphere:
Thick Methane
Terraforming state:
Not terraformable
Surface temperature:
170 K
Praea Euq QY-Y b14-4 AB 5 c
/ Icy body
Distance to arrival:
1,735 ls
Estimated value:
500 cr
Earth masses:
0.0068
Radius:
1,659 km
Surface pressure:
0.48 Atmospheres
Gravity:
0.10 G
Volcanism:
No volcanism
Atmosphere:
Methane
Terraforming state:
Not terraformable
Surface temperature:
119 K
Praea Euq QY-Y b14-4 AB 5 d
/ Icy body
Distance to arrival:
1,742 ls
Estimated value:
500 cr
Earth masses:
0.0287
Radius:
2,661 km
Surface pressure:
1.29 Atmospheres
Gravity:
0.16 G
Volcanism:
No volcanism
Atmosphere:
Methane
Terraforming state:
Not terraformable
Surface temperature:
127 K
Praea Euq QY-Y b14-4 AB 6
/ Icy body
Distance to arrival:
1,720 ls
Estimated value:
529 cr
Earth masses:
4.4267
Radius:
11,963 km
Surface pressure:
0.82 Atmospheres
Gravity:
1.26 G
Volcanism:
Major Water Geysers
Atmosphere:
Helium
Terraforming state:
Not terraformable
Surface temperature:
57 K
Praea Euq QY-Y b14-4 AB 1
/ Class III gas giant
Distance to arrival:
871 ls
Estimated value:
1,051 cr
Earth masses:
1,693.6427
Radius:
75,267 km
Reserve level:
Pristine
Gravity:
12.16 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
417 K
Praea Euq QY-Y b14-4 AB 1 a
/ Rocky body
(Landable)
Distance to arrival:
871 ls
Estimated value:
500 cr
Earth masses:
0.0007
Radius:
620 km
Gravity:
0.07 G
Volcanism:
Major Silicate Vapour Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
180 K
Materials:
Fe
(18.9%)
S
(18.6%)
C
(15.6%)
Ni
(14.3%)
P
(10.0%)
Cr
(8.5%)
Ge
(5.5%)
Zn
(5.1%)
Nb
(1.3%)
Ru
(1.2%)
Sn
(1.1%)
Praea Euq QY-Y b14-4 AB 1 b
/ Rocky body
Distance to arrival:
872 ls
Estimated value:
500 cr
Earth masses:
0.0008
Radius:
644 km
Gravity:
0.07 G
Volcanism:
Major Rocky Magma
Atmosphere:
Sulphur dioxide
Terraforming state:
Not terraformable
Surface temperature:
160 K
Praea Euq QY-Y b14-4 AB 1 c
/ Rocky body
Distance to arrival:
870 ls
Estimated value:
500 cr
Earth masses:
0.0022
Radius:
908 km
Surface pressure:
1.43 Atmospheres
Gravity:
0.11 G
Volcanism:
No volcanism
Atmosphere:
Carbon dioxide
Terraforming state:
Not terraformable
Surface temperature:
252 K
Praea Euq QY-Y b14-4 AB 1 d
/ Rocky body
Distance to arrival:
869 ls
Estimated value:
500 cr
Earth masses:
0.0009
Radius:
670 km
Surface pressure:
0.01 Atmospheres
Gravity:
0.08 G
Volcanism:
No volcanism
Atmosphere:
Thin Carbon dioxide
Terraforming state:
Not terraformable
Surface temperature:
157 K
Praea Euq QY-Y b14-4 AB 1 e
/ Icy body
(Landable)
Distance to arrival:
869 ls
Estimated value:
500 cr
Earth masses:
0.0040
Radius:
1,311 km
Gravity:
0.10 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
117 K
Materials:
S
(24.3%)
C
(20.5%)
Fe
(14.7%)
P
(13.1%)
Ni
(11.1%)
Mn
(6.1%)
Zn
(4.0%)
V
(3.6%)
Mo
(1.0%)
Sb
(0.9%)
Sn
(0.9%)
Praea Euq QY-Y b14-4 AB 1 f
/ Icy body
(Landable)
Distance to arrival:
874 ls
Estimated value:
500 cr
Earth masses:
0.0059
Radius:
1,489 km
Gravity:
0.11 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
111 K
Materials:
S
(24.1%)
C
(20.3%)
Fe
(14.5%)
P
(13.0%)
Ni
(11.0%)
Cr
(6.5%)
Zn
(4.0%)
V
(3.6%)
Te
(1.1%)
Nb
(1.0%)
Mo
(1.0%)
Praea Euq QY-Y b14-4 AB 4
/ Class II gas giant
Distance to arrival:
1,449 ls
Estimated value:
30,291 cr
Earth masses:
769.0531
Radius:
77,544 km
Gravity:
5.20 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
187 K
Praea Euq QY-Y b14-4 AB 4 a
/ Icy body
(Landable)
Distance to arrival:
1,449 ls
Estimated value:
500 cr
Earth masses:
0.0097
Radius:
1,865 km
Gravity:
0.11 G
Volcanism:
Major Water Magma
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
79 K
Materials:
S
(27.1%)
C
(22.8%)
P
(14.6%)
Fe
(12.2%)
Ni
(9.2%)
Cr
(5.5%)
Ge
(3.5%)
V
(3.0%)
Nb
(0.8%)
Sb
(0.7%)
Hg
(0.5%)
Praea Euq QY-Y b14-4 AB 4 a a
/ Icy body
(Landable)
Distance to arrival:
1,449 ls
Estimated value:
500 cr
Earth masses:
0.0002
Radius:
524 km
Gravity:
0.03 G
Volcanism:
Water Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
79 K
Materials:
S
(29.8%)
C
(25.0%)
P
(16.0%)
Fe
(9.1%)
Ni
(6.9%)
Se
(4.7%)
Cr
(4.1%)
Zn
(2.5%)
Sb
(0.7%)
Nb
(0.6%)
Mo
(0.6%)
Praea Euq QY-Y b14-4 AB 4 b
/ Icy body
(Landable)
Distance to arrival:
1,455 ls
Estimated value:
500 cr
Earth masses:
0.0053
Radius:
1,535 km
Gravity:
0.09 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
74 K
Materials:
S
(27.2%)
C
(22.9%)
P
(14.6%)
Fe
(12.2%)
Ni
(9.2%)
Cr
(5.5%)
Zn
(3.3%)
V
(3.0%)
Nb
(0.8%)
Sb
(0.7%)
W
(0.7%)
Praea Euq QY-Y b14-4 AB 4 c
/ Icy body
Distance to arrival:
1,454 ls
Estimated value:
500 cr
Earth masses:
0.0053
Radius:
1,533 km
Surface pressure:
40.63 Atmospheres
Gravity:
0.09 G
Volcanism:
Minor Carbon Dioxide Geysers
Atmosphere:
Thick Methane
Terraforming state:
Not terraformable
Surface temperature:
216 K
Praea Euq QY-Y b14-4 AB 4 d
/ Icy body
Distance to arrival:
1,454 ls
Estimated value:
500 cr
Earth masses:
0.0037
Radius:
1,361 km
Surface pressure:
31.76 Atmospheres
Gravity:
0.08 G
Volcanism:
Carbon Dioxide Geysers
Atmosphere:
Thick Methane
Terraforming state:
Not terraformable
Surface temperature:
210 K
Praea Euq QY-Y b14-4 AB 4 e
/ Icy body
Distance to arrival:
1,441 ls
Estimated value:
500 cr
Earth masses:
0.0070
Radius:
1,678 km
Surface pressure:
0.49 Atmospheres
Gravity:
0.10 G
Volcanism:
No volcanism
Atmosphere:
Methane
Terraforming state:
Not terraformable
Surface temperature:
122 K
Praea Euq QY-Y b14-4 AB 4 e a
/ Icy body
Distance to arrival:
1,441 ls
Estimated value:
500 cr
Earth masses:
0.0002
Radius:
540 km
Surface pressure:
4.65 Atmospheres
Gravity:
0.03 G
Volcanism:
Major Water Geysers
Atmosphere:
Methane
Terraforming state:
Not terraformable
Surface temperature:
159 K
Praea Euq QY-Y b14-4 AB 4 f
/ Icy body
Distance to arrival:
1,451 ls
Estimated value:
500 cr
Earth masses:
0.0151
Radius:
2,156 km
Surface pressure:
0.83 Atmospheres
Gravity:
0.13 G
Volcanism:
No volcanism
Atmosphere:
Methane
Terraforming state:
Not terraformable
Surface temperature:
127 K
Praea Euq QY-Y b14-4 AB 4 f a
/ Icy body
Distance to arrival:
1,451 ls
Estimated value:
500 cr
Earth masses:
0.0004
Radius:
680 km
Surface pressure:
7.27 Atmospheres
Gravity:
0.04 G
Volcanism:
Major Water Magma
Atmosphere:
Thick Methane
Terraforming state:
Not terraformable
Surface temperature:
165 K
Praea Euq QY-Y b14-4 AB 4 g
/ Icy body
Distance to arrival:
1,444 ls
Estimated value:
500 cr
Earth masses:
0.0096
Radius:
1,862 km
Surface pressure:
0.61 Atmospheres
Gravity:
0.11 G
Volcanism:
No volcanism
Atmosphere:
Methane
Terraforming state:
Not terraformable
Surface temperature:
120 K
Praea Euq QY-Y b14-4 AB 7
/ Class I gas giant
Distance to arrival:
2,396 ls
Estimated value:
3,784 cr
Earth masses:
60.3135
Radius:
50,289 km
Reserve level:
Pristine
Gravity:
0.97 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
53 K
Praea Euq QY-Y b14-4 AB 7 a
/ Icy body
(Landable)
Distance to arrival:
2,397 ls
Estimated value:
500 cr
Earth masses:
0.0002
Radius:
547 km
Gravity:
0.03 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
44 K
Materials:
S
(27.0%)
C
(22.7%)
P
(14.5%)
Fe
(12.1%)
Ni
(9.1%)
Cr
(5.4%)
Mn
(5.0%)
As
(1.6%)
Cd
(0.9%)
Te
(0.9%)
Sn
(0.7%)
Praea Euq QY-Y b14-4 AB 7 b
/ Icy body
(Landable)
Distance to arrival:
2,392 ls
Estimated value:
500 cr
Earth masses:
0.0005
Radius:
716 km
Gravity:
0.04 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
44 K
Materials:
S
(27.4%)
C
(23.1%)
P
(14.8%)
Fe
(12.4%)
Ni
(9.4%)
Cr
(5.6%)
Zn
(3.4%)
Zr
(1.4%)
Cd
(1.0%)
Mo
(0.8%)
Ru
(0.8%)
Praea Euq QY-Y b14-4 AB 7 c
/ Icy body
(Landable)
Distance to arrival:
2,400 ls
Estimated value:
500 cr
Earth masses:
0.0002
Radius:
495 km
Gravity:
0.03 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
44 K
Materials:
S
(28.2%)
C
(23.7%)
P
(15.2%)
Fe
(12.6%)
Ni
(9.5%)
Ge
(3.7%)
Zn
(3.4%)
As
(1.6%)
Cd
(1.0%)
W
(0.7%)
Tc
(0.5%)
Praea Euq QY-Y b14-4 AB 7 d
/ Icy body
(Landable)
Distance to arrival:
2,390 ls
Estimated value:
500 cr
Earth masses:
0.0002
Radius:
547 km
Gravity:
0.03 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
44 K
Materials:
S
(26.6%)
C
(22.3%)
P
(14.3%)
Fe
(11.9%)
Ni
(9.0%)
Cr
(5.3%)
Mn
(4.9%)
Ge
(3.4%)
Nb
(0.8%)
Mo
(0.8%)
Ru
(0.7%)
Praea Euq QY-Y b14-4 AB 7 e
/ Icy body
(Landable)
Distance to arrival:
2,403 ls
Estimated value:
500 cr
Earth masses:
0.0006
Radius:
757 km
Gravity:
0.04 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
44 K
Materials:
S
(27.4%)
C
(23.0%)
P
(14.7%)
Fe
(12.5%)
Ni
(9.4%)
Se
(4.3%)
Ge
(3.6%)
V
(3.1%)
Mo
(0.8%)
Ru
(0.8%)
Hg
(0.5%)
Praea Euq QY-Y b14-4 AB 7 f
/ Icy body
(Landable)
Distance to arrival:
2,402 ls
Estimated value:
500 cr
Earth masses:
0.0002
Radius:
547 km
Gravity:
0.03 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
44 K
Materials:
S
(26.8%)
C
(22.6%)
P
(14.4%)
Fe
(12.0%)
Ni
(9.1%)
Cr
(5.4%)
Se
(4.2%)
Zn
(3.3%)
Nb
(0.8%)
Sn
(0.7%)
Y
(0.7%)
Praea Euq QY-Y b14-4 AB 7 g
/ Icy body
(Landable)
Distance to arrival:
2,399 ls
Estimated value:
500 cr
Earth masses:
0.0003
Radius:
616 km
Gravity:
0.04 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
44 K
Materials:
S
(27.8%)
C
(23.3%)
P
(14.9%)
Fe
(12.4%)
Ni
(9.4%)
Mn
(5.1%)
Zn
(3.4%)
As
(1.6%)
Cd
(1.0%)
W
(0.7%)
Tc
(0.4%)
Praea Euq QY-Y b14-4 AB 8
/ Icy body
Distance to arrival:
3,302 ls
Estimated value:
582 cr
Earth masses:
12.6376
Radius:
15,734 km
Surface pressure:
2.23 Atmospheres
Reserve level:
Pristine
Gravity:
2.08 G
Volcanism:
Water Geysers
Atmosphere:
Helium
Terraforming state:
Not terraformable
Surface temperature:
39 K
Praea Euq QY-Y b14-4 B
/ M (Red dwarf) Star
(Scoopable)
Distance to arrival:
307 ls
Estimated value:
1,207 cr
Solar masses:
0.3750
Solar radius:
0.5523
Age:
5,104 million years
Luminosity:
Va
Surface temperature:
3,082 K