Eol Prou MR-R b47-5 [#11528360379801]
Eol Prou MR-R b47-5
/ M (Red dwarf) Star
(Scoopable)
Distance to arrival:
0 ls
Estimated value:
1,208 cr
Solar masses:
0.4453
Solar radius:
0.5708
Age:
3,606 million years
Luminosity:
Va
Surface temperature:
3,318 K
Eol Prou MR-R b47-5 A Belt
Class:
Rocky
Mass:
87,811,000,000,000 Mt
Inner radius:
653,230 km
Outer radius:
1,842,700 km
Eol Prou MR-R b47-5 1
/ High metal content world
(Landable)
Distance to arrival:
29 ls
Estimated value:
14,310 cr
Earth masses:
0.4493
Radius:
4,769 km
Gravity:
0.80 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
448 K
Materials:
Fe
(22.9%)
Ni
(17.4%)
S
(16.2%)
C
(13.6%)
Cr
(10.3%)
P
(8.7%)
V
(5.6%)
As
(2.1%)
Nb
(1.6%)
Hg
(1.0%)
Po
(0.6%)
Eol Prou MR-R b47-5 2
/ High metal content world
Distance to arrival:
52 ls
Estimated value:
14,880 cr
Earth masses:
0.8006
Radius:
5,686 km
Surface pressure:
134.28 Atmospheres
Gravity:
1.01 G
Volcanism:
Major Silicate Vapour Geysers
Atmosphere:
Hot thick Carbon dioxide
Terraforming state:
Not terraformable
Surface temperature:
1,011 K
Eol Prou MR-R b47-5 3
/ High metal content world
Distance to arrival:
52 ls
Estimated value:
14,575 cr
Earth masses:
0.5931
Radius:
5,192 km
Surface pressure:
18.15 Atmospheres
Gravity:
0.90 G
Volcanism:
Major Silicate Vapour Geysers
Atmosphere:
Hot thick Carbon dioxide
Terraforming state:
Not terraformable
Surface temperature:
787 K
Eol Prou MR-R b47-5 4
/ High metal content world
Distance to arrival:
92 ls
Estimated value:
169,467 cr
Earth masses:
0.7621
Radius:
5,602 km
Surface pressure:
133.20 Atmospheres
Gravity:
0.99 G
Volcanism:
No volcanism
Atmosphere:
Hot thick Carbon dioxide
Terraforming state:
Candidate for terraforming
Surface temperature:
755 K
Eol Prou MR-R b47-5 5
/ Water world
Distance to arrival:
167 ls
Estimated value:
110,988 cr
Earth masses:
3.1513
Radius:
8,418 km
Surface pressure:
2.67 Atmospheres
Gravity:
1.81 G
Volcanism:
Metallic Magma
Atmosphere:
Nitrogen
Terraforming state:
Not terraformable
Surface temperature:
264 K
Eol Prou MR-R b47-5 5 a
/ Rocky body
(Landable)
Distance to arrival:
167 ls
Estimated value:
500 cr
Earth masses:
0.1881
Radius:
3,824 km
Surface pressure:
0.01 Atmospheres
Gravity:
0.52 G
Volcanism:
No volcanism
Atmosphere:
Thin Carbon dioxide
Terraforming state:
Not terraformable
Surface temperature:
218 K
Materials:
Fe
(20.4%)
S
(18.0%)
Ni
(15.5%)
C
(15.2%)
P
(9.7%)
Cr
(9.2%)
Zn
(5.6%)
Se
(2.8%)
Nb
(1.4%)
Sb
(1.1%)
W
(1.1%)
Eol Prou MR-R b47-5 6
/ Class III gas giant
Distance to arrival:
474 ls
Estimated value:
1,033 cr
Earth masses:
1,499.5432
Radius:
76,090 km
Reserve level:
Pristine
Gravity:
10.54 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
389 K
Eol Prou MR-R b47-5 6 a
/ Rocky body
(Landable)
Distance to arrival:
475 ls
Estimated value:
500 cr
Earth masses:
0.0024
Radius:
934 km
Gravity:
0.11 G
Volcanism:
Metallic Magma
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
183 K
Materials:
Fe
(18.6%)
S
(18.1%)
C
(15.2%)
Ni
(14.1%)
P
(9.7%)
Cr
(8.4%)
Mn
(7.7%)
Zn
(5.1%)
Cd
(1.5%)
W
(1.0%)
Tc
(0.7%)
Eol Prou MR-R b47-5 6 b
/ Rocky body
(Landable)
Distance to arrival:
473 ls
Estimated value:
500 cr
Earth masses:
0.0040
Radius:
1,111 km
Gravity:
0.13 G
Volcanism:
Minor Metallic Magma
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
175 K
Materials:
Fe
(19.3%)
S
(18.6%)
C
(15.7%)
Ni
(14.6%)
P
(10.0%)
Mn
(8.0%)
Ge
(5.5%)
V
(4.8%)
Cd
(1.5%)
Sb
(1.2%)
Hg
(0.8%)
Eol Prou MR-R b47-5 6 c
/ Rocky body
(Landable)
Distance to arrival:
475 ls
Estimated value:
500 cr
Earth masses:
0.0024
Radius:
945 km
Gravity:
0.11 G
Volcanism:
Minor Silicate Vapour Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
173 K
Materials:
Fe
(19.3%)
S
(18.7%)
C
(15.7%)
Ni
(14.6%)
P
(10.1%)
Cr
(8.7%)
Mn
(8.0%)
Zr
(2.2%)
Nb
(1.3%)
Hg
(0.8%)
Tc
(0.7%)
Eol Prou MR-R b47-5 6 d
/ Rocky body
(Landable)
Distance to arrival:
471 ls
Estimated value:
500 cr
Earth masses:
0.0058
Radius:
1,256 km
Gravity:
0.15 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
164 K
Materials:
Fe
(19.1%)
S
(18.5%)
C
(15.6%)
Ni
(14.4%)
P
(10.0%)
Cr
(8.6%)
Ge
(5.5%)
Zn
(5.2%)
Nb
(1.3%)
Y
(1.1%)
Hg
(0.8%)
Eol Prou MR-R b47-5 6 e
/ Rocky body
(Landable)
Distance to arrival:
479 ls
Estimated value:
500 cr
Earth masses:
0.0060
Radius:
1,271 km
Gravity:
0.15 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
151 K
Materials:
Fe
(20.3%)
S
(19.7%)
C
(16.6%)
Ni
(15.3%)
P
(10.6%)
Cr
(9.1%)
As
(2.6%)
Zr
(2.4%)
Mo
(1.3%)
Ru
(1.3%)
Hg
(0.9%)
Eol Prou MR-R b47-5 7
/ Class I gas giant
Distance to arrival:
506 ls
Estimated value:
2,782 cr
Earth masses:
2.5041
Radius:
15,463 km
Reserve level:
Pristine
Gravity:
0.43 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
124 K
Eol Prou MR-R b47-5 8
/ Class II gas giant
Distance to arrival:
1,024 ls
Estimated value:
30,539 cr
Earth masses:
816.2587
Radius:
76,970 km
Reserve level:
Pristine
Gravity:
5.60 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
204 K
Eol Prou MR-R b47-5 8 a
/ Icy body
(Landable)
Distance to arrival:
1,024 ls
Estimated value:
500 cr
Earth masses:
0.0050
Radius:
1,501 km
Gravity:
0.09 G
Volcanism:
Major Water Magma
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
87 K
Materials:
S
(27.0%)
C
(22.7%)
P
(14.6%)
Fe
(12.2%)
Ni
(9.2%)
Cr
(5.5%)
Mn
(5.1%)
Zr
(1.4%)
Nb
(0.8%)
Sb
(0.7%)
Sn
(0.7%)
Eol Prou MR-R b47-5 8 b
/ Icy body
(Landable)
Distance to arrival:
1,029 ls
Estimated value:
500 cr
Earth masses:
0.0055
Radius:
1,553 km
Gravity:
0.09 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
84 K
Materials:
S
(26.3%)
C
(22.2%)
P
(14.2%)
Fe
(11.9%)
Ni
(9.0%)
Cr
(5.4%)
Mn
(4.9%)
Se
(4.1%)
Cd
(0.9%)
W
(0.7%)
Tc
(0.4%)
Eol Prou MR-R b47-5 8 c
/ Icy body
(Landable)
Distance to arrival:
1,023 ls
Estimated value:
500 cr
Earth masses:
0.0097
Radius:
1,867 km
Gravity:
0.11 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
82 K
Materials:
S
(27.4%)
C
(23.1%)
P
(14.8%)
Fe
(12.5%)
Ni
(9.4%)
Mn
(5.1%)
Ge
(3.6%)
As
(1.6%)
Cd
(1.0%)
Mo
(0.8%)
Ru
(0.8%)
Eol Prou MR-R b47-5 8 c a
/ Icy body
(Landable)
Distance to arrival:
1,023 ls
Estimated value:
500 cr
Earth masses:
0.0002
Radius:
517 km
Gravity:
0.03 G
Volcanism:
Major Water Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
82 K
Materials:
S
(30.3%)
C
(25.5%)
P
(16.3%)
Fe
(9.4%)
Ni
(7.1%)
Mn
(3.9%)
Ge
(3.1%)
Zn
(2.6%)
Te
(0.8%)
Mo
(0.6%)
Sn
(0.5%)
Eol Prou MR-R b47-5 8 d
/ Icy body
(Landable)
Distance to arrival:
1,017 ls
Estimated value:
500 cr
Earth masses:
0.0063
Radius:
1,620 km
Gravity:
0.10 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
80 K
Materials:
S
(26.7%)
C
(22.4%)
P
(14.4%)
Fe
(12.1%)
Ni
(9.1%)
Cr
(5.4%)
Mn
(5.0%)
V
(3.0%)
Cd
(0.9%)
Nb
(0.8%)
Po
(0.3%)
Eol Prou MR-R b47-5 8 e
/ Icy body
(Landable)
Distance to arrival:
1,014 ls
Estimated value:
500 cr
Earth masses:
0.0043
Radius:
1,424 km
Gravity:
0.09 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
78 K
Materials:
S
(28.0%)
C
(23.6%)
P
(15.1%)
Fe
(12.7%)
Ni
(9.6%)
Se
(4.4%)
Zn
(3.4%)
Zr
(1.5%)
Sn
(0.8%)
W
(0.7%)
Po
(0.3%)
Eol Prou MR-R b47-5 8 f
/ Icy body
(Landable)
Distance to arrival:
1,008 ls
Estimated value:
500 cr
Earth masses:
0.0308
Radius:
2,725 km
Gravity:
0.17 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
75 K
Materials:
S
(26.3%)
C
(22.1%)
P
(14.2%)
Fe
(11.9%)
Ni
(9.0%)
Cr
(5.4%)
Mn
(4.9%)
Se
(4.1%)
Cd
(0.9%)
Ru
(0.7%)
Hg
(0.5%)
Eol Prou MR-R b47-5 9
/ Class I gas giant
Distance to arrival:
1,447 ls
Estimated value:
3,624 cr
Earth masses:
40.8592
Radius:
47,150 km
Gravity:
0.75 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
65 K
Eol Prou MR-R b47-5 9 a
/ Icy body
(Landable)
Distance to arrival:
1,448 ls
Estimated value:
500 cr
Earth masses:
0.0005
Radius:
721 km
Gravity:
0.04 G
Volcanism:
Water Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
57 K
Materials:
S
(26.9%)
C
(22.7%)
P
(14.5%)
Fe
(12.2%)
Ni
(9.2%)
Cr
(5.5%)
Ge
(3.5%)
Zn
(3.3%)
Mo
(0.8%)
Sb
(0.7%)
Sn
(0.7%)
Eol Prou MR-R b47-5 9 b
/ Icy body
(Landable)
Distance to arrival:
1,448 ls
Estimated value:
500 cr
Earth masses:
0.0010
Radius:
892 km
Gravity:
0.05 G
Volcanism:
Minor Carbon Dioxide Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
57 K
Materials:
S
(27.1%)
C
(22.8%)
P
(14.6%)
Fe
(12.3%)
Ni
(9.3%)
Mn
(5.1%)
Ge
(3.5%)
Zn
(3.3%)
Sb
(0.7%)
Sn
(0.7%)
W
(0.7%)
Eol Prou MR-R b47-5 9 c
/ Icy body
(Landable)
Distance to arrival:
1,449 ls
Estimated value:
500 cr
Earth masses:
0.0004
Radius:
624 km
Gravity:
0.04 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
56 K
Materials:
S
(27.3%)
C
(22.9%)
P
(14.7%)
Fe
(12.3%)
Ni
(9.3%)
Mn
(5.1%)
Se
(4.3%)
As
(1.6%)
Cd
(1.0%)
Nb
(0.8%)
Y
(0.7%)
Eol Prou MR-R b47-5 9 d
/ Icy body
(Landable)
Distance to arrival:
1,446 ls
Estimated value:
500 cr
Earth masses:
0.0021
Radius:
1,130 km
Gravity:
0.07 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
56 K
Materials:
S
(28.6%)
C
(24.1%)
P
(15.4%)
Fe
(12.9%)
Ni
(9.8%)
Zn
(3.5%)
As
(1.7%)
Zr
(1.5%)
Cd
(1.0%)
Y
(0.8%)
W
(0.7%)
Eol Prou MR-R b47-5 9 e
/ Icy body
(Landable)
Distance to arrival:
1,451 ls
Estimated value:
500 cr
Earth masses:
0.0016
Radius:
1,019 km
Surface pressure:
0.00 Atmospheres
Gravity:
0.06 G
Volcanism:
No volcanism
Atmosphere:
Thin Argon
Terraforming state:
Not terraformable
Surface temperature:
56 K
Materials:
S
(26.1%)
C
(22.0%)
P
(14.1%)
Fe
(12.0%)
Ni
(9.1%)
Cr
(5.4%)
Mn
(4.9%)
Se
(4.1%)
Cd
(0.9%)
Mo
(0.8%)
Y
(0.7%)
Eol Prou MR-R b47-5 9 f
/ Icy body
(Landable)
Distance to arrival:
1,446 ls
Estimated value:
500 cr
Earth masses:
0.0007
Radius:
767 km
Surface pressure:
0.00 Atmospheres
Gravity:
0.05 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
56 K
Materials:
S
(26.7%)
C
(22.4%)
P
(14.4%)
Fe
(12.1%)
Ni
(9.1%)
Cr
(5.4%)
Se
(4.2%)
Ge
(3.5%)
Te
(0.9%)
Sn
(0.7%)
W
(0.7%)
Eol Prou MR-R b47-5 10
/ Class I gas giant
Distance to arrival:
1,926 ls
Estimated value:
4,167 cr
Earth masses:
137.9958
Radius:
61,449 km
Reserve level:
Pristine
Gravity:
1.49 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
68 K
Eol Prou MR-R b47-5 10 a
/ Icy body
(Landable)
Distance to arrival:
1,927 ls
Estimated value:
500 cr
Earth masses:
0.0006
Radius:
748 km
Gravity:
0.04 G
Volcanism:
Carbon Dioxide Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
51 K
Materials:
S
(27.2%)
C
(22.9%)
P
(14.6%)
Fe
(12.4%)
Ni
(9.4%)
Mn
(5.1%)
Ge
(3.5%)
V
(3.0%)
Mo
(0.8%)
Sn
(0.7%)
Po
(0.3%)
Eol Prou MR-R b47-5 10 b
/ Icy body
(Landable)
Distance to arrival:
1,925 ls
Estimated value:
500 cr
Earth masses:
0.0002
Radius:
522 km
Gravity:
0.03 G
Volcanism:
Minor Carbon Dioxide Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
51 K
Materials:
S
(27.3%)
C
(23.0%)
P
(14.7%)
Fe
(12.4%)
Ni
(9.3%)
Se
(4.3%)
Ge
(3.5%)
V
(3.0%)
Cd
(1.0%)
Nb
(0.8%)
Y
(0.7%)
Eol Prou MR-R b47-5 10 c
/ Icy body
(Landable)
Distance to arrival:
1,924 ls
Estimated value:
500 cr
Earth masses:
0.0006
Radius:
745 km
Gravity:
0.04 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
51 K
Materials:
S
(27.3%)
C
(23.0%)
P
(14.7%)
Fe
(12.4%)
Ni
(9.4%)
Se
(4.3%)
Ge
(3.5%)
Zn
(3.4%)
Mo
(0.8%)
Sb
(0.8%)
Hg
(0.5%)
Eol Prou MR-R b47-5 10 d
/ Icy body
(Landable)
Distance to arrival:
1,924 ls
Estimated value:
500 cr
Earth masses:
0.0004
Radius:
632 km
Gravity:
0.04 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
50 K
Materials:
S
(27.4%)
C
(23.1%)
P
(14.8%)
Fe
(12.4%)
Ni
(9.4%)
Mn
(5.1%)
Se
(4.3%)
As
(1.6%)
Y
(0.7%)
W
(0.7%)
Hg
(0.5%)
Eol Prou MR-R b47-5 10 e
/ Icy body
(Landable)
Distance to arrival:
1,931 ls
Estimated value:
500 cr
Earth masses:
0.0026
Radius:
1,201 km
Gravity:
0.07 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
50 K
Materials:
S
(26.8%)
C
(22.6%)
P
(14.4%)
Fe
(12.4%)
Ni
(9.4%)
Cr
(5.6%)
Ge
(3.5%)
V
(3.0%)
Nb
(0.9%)
Sb
(0.8%)
W
(0.7%)
Eol Prou MR-R b47-5 10 f
/ Icy body
(Landable)
Distance to arrival:
1,930 ls
Estimated value:
500 cr
Earth masses:
0.0010
Radius:
879 km
Gravity:
0.05 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
50 K
Materials:
S
(27.4%)
C
(23.0%)
P
(14.8%)
Fe
(12.4%)
Ni
(9.4%)
Cr
(5.6%)
Ge
(3.6%)
As
(1.6%)
Nb
(0.9%)
Y
(0.7%)
Sn
(0.7%)
Eol Prou MR-R b47-5 10 g
/ Icy body
(Landable)
Distance to arrival:
1,932 ls
Estimated value:
500 cr
Earth masses:
0.0018
Radius:
1,070 km
Gravity:
0.06 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
50 K
Materials:
S
(26.5%)
C
(22.3%)
P
(14.3%)
Fe
(12.0%)
Ni
(9.1%)
Cr
(5.4%)
Mn
(5.0%)
Zn
(3.3%)
Nb
(0.8%)
Y
(0.7%)
Sn
(0.7%)
Eol Prou MR-R b47-5 10 h
/ Icy body
(Landable)
Distance to arrival:
1,918 ls
Estimated value:
500 cr
Earth masses:
0.0018
Radius:
1,070 km
Gravity:
0.06 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
49 K
Materials:
S
(27.4%)
C
(23.0%)
P
(14.7%)
Fe
(12.4%)
Ni
(9.4%)
Cr
(5.6%)
Ge
(3.6%)
As
(1.6%)
Te
(0.9%)
Mo
(0.8%)
W
(0.7%)
Eol Prou MR-R b47-5 10 i
/ Icy body
(Landable)
Distance to arrival:
1,920 ls
Estimated value:
500 cr
Earth masses:
0.0028
Radius:
1,240 km
Gravity:
0.07 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
49 K
Materials:
S
(26.7%)
C
(22.4%)
P
(14.4%)
Fe
(12.3%)
Ni
(9.3%)
Mn
(5.1%)
Se
(4.2%)
Zn
(3.3%)
Cd
(1.0%)
Y
(0.7%)
W
(0.7%)
Eol Prou MR-R b47-5 10 i a
/ Icy body
(Landable)
Distance to arrival:
1,920 ls
Estimated value:
500 cr
Earth masses:
0.0002
Radius:
559 km
Gravity:
0.03 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
49 K
Materials:
S
(29.9%)
C
(25.2%)
P
(16.1%)
Fe
(9.3%)
Ni
(7.0%)
Se
(4.7%)
Mn
(3.8%)
V
(2.3%)
Te
(0.8%)
Sn
(0.5%)
Hg
(0.4%)
Eol Prou MR-R b47-5 10 j
/ Icy body
(Landable)
Distance to arrival:
1,895 ls
Estimated value:
500 cr
Earth masses:
0.0300
Radius:
2,732 km
Gravity:
0.16 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
49 K
Materials:
S
(27.3%)
C
(22.9%)
P
(14.7%)
Fe
(12.0%)
Ni
(9.1%)
Cr
(5.4%)
Zn
(3.3%)
Ge
(3.1%)
Te
(0.8%)
Mo
(0.8%)
Sn
(0.7%)
Eol Prou MR-R b47-5 11
/ Icy body
Distance to arrival:
2,727 ls
Estimated value:
540 cr
Earth masses:
5.6763
Radius:
12,799 km
Surface pressure:
1.02 Atmospheres
Reserve level:
Pristine
Gravity:
1.41 G
Volcanism:
Major Water Geysers
Atmosphere:
Helium
Terraforming state:
Not terraformable
Surface temperature:
42 K