Systease EC-D d12-3 [#106375943915]

100,00%
Systease EC-D d12-3 A / G (White-Yellow) Star (Scoopable)
Distance to arrival:
0 ls
Estimated value:
1 222 cr

Solar masses:
1,2305
Solar radius:
1,2360
Age:
3 588 million years
Luminosity:
Vab

Surface temperature:
5 981 K
Systease EC-D d12-3 A A Belt
Class:
Metallic

Mass:
40 957 000 Mt

Inner radius:
1 369 200 km
Outer radius:
2 585 800 km
Systease EC-D d12-3 A 1 / Metal-rich body (Landable)
Distance to arrival:
41 ls
Estimated value:
27 813 cr

Earth masses:
0,0278
Radius:
1 588 km

Gravity:
0,45 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
1 009 K

Materials:
Fe (32,7%) Ni (24,7%) Cr (14,7%) Mn (13,5%) Zn (8,9%) Cd (2,5%) Mo (2,1%) Po (1,0%)
Systease EC-D d12-3 A 2 / High metal content world (Landable)
Distance to arrival:
125 ls
Estimated value:
14 138 cr

Earth masses:
0,3723
Radius:
4 492 km

Gravity:
0,75 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
585 K

Materials:
Fe (21,4%) Ni (16,2%) S (15,1%) C (12,7%) Cr (9,6%) Mn (8,8%) P (8,1%) Ge (4,5%) Sn (1,4%) Y (1,3%) Hg (0,9%)
Systease EC-D d12-3 A 2 a / Rocky body (Landable)
Distance to arrival:
125 ls
Estimated value:
500 cr

Earth masses:
0,0210
Radius:
1 893 km

Gravity:
0,24 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
585 K

Materials:
Fe (20,0%) S (18,0%) Ni (15,1%) C (15,1%) P (9,7%) Mn (8,3%) Ge (5,3%) V (4,9%) Mo (1,3%) Y (1,2%) W (1,1%)
Systease EC-D d12-3 A 3 / High metal content world (Landable)
Distance to arrival:
171 ls
Estimated value:
13 794 cr

Earth masses:
0,2498
Radius:
3 980 km

Gravity:
0,64 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
502 K

Materials:
Fe (22,7%) Ni (17,2%) S (16,2%) C (13,6%) Mn (9,4%) P (8,7%) V (5,6%) Se (2,5%) Cd (1,8%) Te (1,3%) Hg (1,0%)
Systease EC-D d12-3 A 4 / High metal content world
Distance to arrival:
240 ls
Estimated value:
13 960 cr

Earth masses:
0,3042
Radius:
4 232 km

Surface pressure:
0,39 Atmospheres

Gravity:
0,69 G

Volcanism:
No volcanism
Atmosphere:
Sulphur dioxide
Terraforming state:
Not terraformable

Surface temperature:
440 K
Systease EC-D d12-3 A 5 / High metal content world
Distance to arrival:
327 ls
Estimated value:
14 258 cr

Earth masses:
0,4249
Radius:
4 694 km

Surface pressure:
4,02 Atmospheres

Gravity:
0,78 G

Volcanism:
No volcanism
Atmosphere:
Hot Carbon dioxide
Terraforming state:
Not terraformable

Surface temperature:
702 K
Systease EC-D d12-3 A 6 / High metal content world
Distance to arrival:
328 ls
Estimated value:
14 034 cr

Earth masses:
0,3313
Radius:
4 345 km

Surface pressure:
0,52 Atmospheres

Gravity:
0,71 G

Volcanism:
No volcanism
Atmosphere:
Sulphur dioxide
Terraforming state:
Not terraformable

Surface temperature:
380 K
Systease EC-D d12-3 A 7 / High metal content world
Distance to arrival:
412 ls
Estimated value:
13 905 cr

Earth masses:
0,2852
Radius:
4 148 km

Surface pressure:
0,31 Atmospheres

Gravity:
0,67 G

Volcanism:
No volcanism
Atmosphere:
Sulphur dioxide
Terraforming state:
Not terraformable

Surface temperature:
337 K
Systease EC-D d12-3 A 8 / High metal content world
Distance to arrival:
595 ls
Estimated value:
184 930 cr

Earth masses:
2,4345
Radius:
7 886 km

Surface pressure:
359,94 Atmospheres

Gravity:
1,59 G

Volcanism:
Minor Metallic Magma
Atmosphere:
Hot thick Carbon dioxide
Terraforming state:
Candidate for terraforming

Surface temperature:
925 K
Systease EC-D d12-3 A 9 / Water world
Distance to arrival:
1 035 ls
Estimated value:
283 253 cr

Earth masses:
0,9818
Radius:
6 052 km

Surface pressure:
4,92 Atmospheres

Gravity:
1,09 G

Volcanism:
Major Rocky Magma
Atmosphere:
Water-rich
Terraforming state:
Candidate for terraforming

Surface temperature:
388 K
Systease EC-D d12-3 A 10 / Water world
Distance to arrival:
1 035 ls
Estimated value:
277 217 cr

Earth masses:
0,7240
Radius:
5 523 km

Surface pressure:
1,65 Atmospheres

Gravity:
0,97 G

Volcanism:
No volcanism
Atmosphere:
Nitrogen
Terraforming state:
Candidate for terraforming

Surface temperature:
361 K
Systease EC-D d12-3 A 11 / High metal content world
Distance to arrival:
1 397 ls
Estimated value:
15 385 cr

Earth masses:
1,2700
Radius:
6 533 km

Surface pressure:
3 728,48 Atmospheres

Gravity:
1,21 G

Volcanism:
No volcanism
Atmosphere:
Hot thick Water
Terraforming state:
Not terraformable

Surface temperature:
1 095 K
Systease EC-D d12-3 A 12 / High metal content world
Distance to arrival:
1 392 ls
Estimated value:
14 937 cr

Earth masses:
0,8452
Radius:
5 787 km

Surface pressure:
7,49 Atmospheres

Gravity:
1,03 G

Volcanism:
Minor Rocky Magma
Atmosphere:
Thick Ammonia-rich
Terraforming state:
Not terraformable

Surface temperature:
385 K
Systease EC-D d12-3 A 13 / Class I gas giant
Distance to arrival:
3 222 ls
Estimated value:
3 290 cr

Earth masses:
16,1268
Radius:
25 840 km

Reserve level:
Pristine

Gravity:
0,98 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
122 K
Systease EC-D d12-3 A 13 a / Icy body (Landable)
Distance to arrival:
3 222 ls
Estimated value:
500 cr

Earth masses:
0,0004
Radius:
630 km

Gravity:
0,04 G

Volcanism:
Major Water Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
109 K

Materials:
S (27,1%) C (22,8%) P (14,6%) Fe (12,3%) Ni (9,3%) Mn (5,1%) Ge (3,6%) V (3,0%) Cd (1,0%) Sb (0,8%) W (0,7%)
Systease EC-D d12-3 A 13 b / Icy body (Landable)
Distance to arrival:
3 222 ls
Estimated value:
500 cr

Earth masses:
0,0002
Radius:
531 km

Gravity:
0,03 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
109 K

Materials:
S (26,2%) C (22,0%) P (14,1%) Fe (11,8%) Ni (9,0%) Cr (5,3%) Mn (4,9%) Se (4,1%) Cd (0,9%) Te (0,9%) Nb (0,8%)
Systease EC-D d12-3 A 13 c / Icy body (Landable)
Distance to arrival:
3 221 ls
Estimated value:
500 cr

Earth masses:
0,0002
Radius:
525 km

Gravity:
0,03 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
109 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%) Te (0,9%) Nb (0,8%) Hg (0,5%)
Systease EC-D d12-3 A 13 d / Icy body (Landable)
Distance to arrival:
3 222 ls
Estimated value:
500 cr

Earth masses:
0,0003
Radius:
618 km

Gravity:
0,04 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
109 K

Materials:
S (26,2%) C (22,0%) P (14,1%) Fe (11,9%) Ni (9,0%) Cr (5,3%) Mn (4,9%) Se (4,1%) Te (0,9%) Nb (0,8%) Mo (0,8%)
Systease EC-D d12-3 A 13 e / Icy body (Landable)
Distance to arrival:
3 223 ls
Estimated value:
500 cr

Earth masses:
0,0006
Radius:
755 km

Gravity:
0,04 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
109 K

Materials:
S (26,9%) C (22,6%) P (14,5%) Fe (12,2%) Ni (9,2%) Cr (5,5%) Se (4,2%) Zn (3,3%) Cd (0,9%) Hg (0,5%) Po (0,3%)
Systease EC-D d12-3 A 13 f / Icy body (Landable)
Distance to arrival:
3 224 ls
Estimated value:
500 cr

Earth masses:
0,0010
Radius:
889 km

Gravity:
0,05 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
109 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%) Nb (0,8%) Sb (0,7%) Hg (0,5%)
Systease EC-D d12-3 A 13 g / Icy body (Landable)
Distance to arrival:
3 227 ls
Estimated value:
500 cr

Earth masses:
0,0425
Radius:
3 056 km

Gravity:
0,18 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
109 K

Materials:
S (27,0%) C (22,7%) P (14,6%) Fe (11,9%) Ni (9,0%) Cr (5,3%) Mn (4,9%) V (2,9%) Cd (0,9%) Hg (0,5%) Po (0,3%)
Systease EC-D d12-3 B / M (Red dwarf) Star (Scoopable)
Distance to arrival:
59 537 ls
Estimated value:
1 207 cr

Solar masses:
0,3906
Solar radius:
0,5460
Age:
3 588 million years
Luminosity:
Va

Surface temperature:
3 485 K
Systease EC-D d12-3 B A Belt
Class:
Rocky

Mass:
34 253 000 000 000 Mt

Inner radius:
732 620 km
Outer radius:
1 764 000 km
Systease EC-D d12-3 B 1 / High metal content world (Landable)
Distance to arrival:
60 126 ls
Estimated value:
13 291 cr

Earth masses:
0,1307
Radius:
3 233 km

Gravity:
0,51 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
683 K

Materials:
Fe (22,1%) Ni (16,7%) S (15,5%) C (13,1%) Mn (9,1%) P (8,4%) Zn (6,0%) Ge (4,6%) Cd (1,7%) Nb (1,5%) Y (1,3%)
Systease EC-D d12-3 B 1 a / Rocky body (Landable)
Distance to arrival:
60 126 ls
Estimated value:
500 cr

Earth masses:
0,0083
Radius:
1 395 km

Gravity:
0,17 G

Volcanism:
Major Silicate Vapour Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
683 K

Materials:
Fe (20,1%) S (18,1%) Ni (15,2%) C (15,2%) P (9,7%) Cr (9,1%) Zn (5,5%) Se (2,8%) Cd (1,6%) Te (1,4%) Nb (1,4%)
Systease EC-D d12-3 B 2 / High metal content world (Landable)
Distance to arrival:
60 115 ls
Estimated value:
12 983 cr

Earth masses:
0,0841
Radius:
2 818 km

Gravity:
0,43 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
531 K

Materials:
Fe (23,8%) Ni (18,0%) S (16,9%) C (14,2%) Mn (9,8%) P (9,1%) Se (2,7%) As (2,3%) Sn (1,6%) Hg (1,0%) Po (0,7%)
Systease EC-D d12-3 B 3 / High metal content world (Landable)
Distance to arrival:
60 070 ls
Estimated value:
13 180 cr

Earth masses:
0,1120
Radius:
3 089 km

Surface pressure:
0,00 Atmospheres

Gravity:
0,48 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
415 K

Materials:
Fe (22,1%) Ni (16,7%) S (15,7%) C (13,2%) Cr (9,9%) P (8,5%) V (5,4%) Ge (4,7%) Cd (1,7%) W (1,2%) Tc (0,8%)
Systease EC-D d12-3 B 4 / High metal content world
Distance to arrival:
60 144 ls
Estimated value:
13 219 cr

Earth masses:
0,1184
Radius:
3 127 km

Surface pressure:
0,00 Atmospheres

Gravity:
0,49 G

Volcanism:
No volcanism
Atmosphere:
Thin Sulphur dioxide
Terraforming state:
Not terraformable

Surface temperature:
372 K
Systease EC-D d12-3 B 5 / High metal content world
Distance to arrival:
60 030 ls
Estimated value:
13 116 cr

Earth masses:
0,1022
Radius:
2 999 km

Surface pressure:
0,00 Atmospheres

Gravity:
0,46 G

Volcanism:
No volcanism
Atmosphere:
Thin Sulphur dioxide
Terraforming state:
Not terraformable

Surface temperature:
325 K
Systease EC-D d12-3 BC 1 / Gas giant with water-based life
Distance to arrival:
61 335 ls
Estimated value:
881 cr

Earth masses:
469,3250
Radius:
75 038 km

Reserve level:
Pristine

Gravity:
3,39 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
150 K
Systease EC-D d12-3 BC 1 a / Icy body (Landable)
Distance to arrival:
61 336 ls
Estimated value:
500 cr

Earth masses:
0,0042
Radius:
1 422 km

Gravity:
0,09 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
86 K

Materials:
S (27,2%) C (22,8%) P (14,6%) Fe (12,2%) Ni (9,2%) Cr (5,5%) Se (4,3%) As (1,6%) Cd (1,0%) Te (0,9%) Mo (0,8%)
Systease EC-D d12-3 BC 1 b / Icy body (Landable)
Distance to arrival:
61 334 ls
Estimated value:
500 cr

Earth masses:
0,0023
Radius:
1 169 km

Gravity:
0,07 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
85 K

Materials:
S (28,2%) C (23,7%) P (15,2%) Fe (12,6%) Ni (9,6%) Ge (3,7%) V (3,1%) Zr (1,5%) Cd (1,0%) Mo (0,8%) Ru (0,8%)
Systease EC-D d12-3 BC 1 c / Icy body (Landable)
Distance to arrival:
61 336 ls
Estimated value:
500 cr

Earth masses:
0,0020
Radius:
1 108 km

Gravity:
0,07 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
84 K

Materials:
S (26,9%) C (22,6%) P (14,5%) Fe (12,1%) Ni (9,1%) Cr (5,4%) Se (4,2%) V (3,0%) Cd (0,9%) Y (0,7%) Hg (0,5%)
Systease EC-D d12-3 BC 1 d / Icy body (Landable)
Distance to arrival:
61 332 ls
Estimated value:
500 cr

Earth masses:
0,0040
Radius:
1 394 km

Gravity:
0,08 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
83 K

Materials:
S (26,9%) C (22,6%) P (14,5%) Fe (12,1%) Ni (9,1%) Cr (5,4%) Ge (3,5%) Zn (3,3%) Cd (0,9%) Te (0,9%) Nb (0,8%)
Systease EC-D d12-3 BC 1 e / Icy body (Landable)
Distance to arrival:
61 339 ls
Estimated value:
500 cr

Earth masses:
0,0042
Radius:
1 419 km

Gravity:
0,09 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
82 K

Materials:
S (27,2%) C (22,8%) P (14,6%) Fe (12,2%) Ni (9,2%) Cr (5,5%) Mn (5,0%) Zr (1,4%) Nb (0,8%) Y (0,7%) Hg (0,5%)
Systease EC-D d12-3 BC 1 f / Icy body (Landable)
Distance to arrival:
61 340 ls
Estimated value:
500 cr

Earth masses:
0,0033
Radius:
1 313 km

Gravity:
0,08 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
81 K

Materials:
S (27,9%) C (23,5%) P (15,0%) Fe (12,5%) Ni (9,5%) Se (4,4%) Ge (3,7%) Zr (1,5%) Sn (0,8%) Y (0,8%) Hg (0,6%)
Systease EC-D d12-3 BC 2 / Class I gas giant
Distance to arrival:
59 596 ls
Estimated value:
4 369 cr

Earth masses:
203,4237
Radius:
67 407 km

Reserve level:
Pristine

Gravity:
1,82 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
98 K
Systease EC-D d12-3 BC 2 a / Icy body
Distance to arrival:
59 598 ls
Estimated value:
500 cr

Earth masses:
0,0004
Radius:
637 km

Surface pressure:
0,07 Atmospheres

Gravity:
0,04 G

Volcanism:
No volcanism
Atmosphere:
Thin Methane
Terraforming state:
Not terraformable

Surface temperature:
103 K
Systease EC-D d12-3 BC 2 b / Icy body
Distance to arrival:
59 600 ls
Estimated value:
500 cr

Earth masses:
0,0003
Radius:
580 km

Surface pressure:
0,06 Atmospheres

Gravity:
0,03 G

Volcanism:
No volcanism
Atmosphere:
Thin Methane
Terraforming state:
Not terraformable

Surface temperature:
100 K
Systease EC-D d12-3 BC 2 c / Icy body
Distance to arrival:
59 600 ls
Estimated value:
500 cr

Earth masses:
0,0004
Radius:
669 km

Surface pressure:
0,07 Atmospheres

Gravity:
0,04 G

Volcanism:
No volcanism
Atmosphere:
Thin Methane
Terraforming state:
Not terraformable

Surface temperature:
102 K
Systease EC-D d12-3 BC 2 d / Icy body
Distance to arrival:
59 581 ls
Estimated value:
500 cr

Earth masses:
0,0011
Radius:
923 km

Surface pressure:
0,14 Atmospheres

Gravity:
0,05 G

Volcanism:
No volcanism
Atmosphere:
Methane
Terraforming state:
Not terraformable

Surface temperature:
108 K
Systease EC-D d12-3 BC 3 / Icy body
Distance to arrival:
56 795 ls
Estimated value:
577 cr

Earth masses:
11,6278
Radius:
15 499 km

Surface pressure:
2,03 Atmospheres

Reserve level:
Pristine

Gravity:
1,97 G

Volcanism:
Water Geysers
Atmosphere:
Helium
Terraforming state:
Not terraformable

Surface temperature:
65 K
Systease EC-D d12-3 C / M (Red dwarf) Star (Scoopable)
Distance to arrival:
59 859 ls
Estimated value:
1 205 cr

Solar masses:
0,2539
Solar radius:
0,4296
Age:
3 588 million years
Luminosity:
Va

Surface temperature:
2 271 K
Systease EC-D d12-3 C 1 / High metal content world (Landable)
Distance to arrival:
59 008 ls
Estimated value:
13 259 cr

Earth masses:
0,1250
Radius:
3 199 km

Gravity:
0,50 G

Volcanism:
Major Rocky Magma
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
583 K

Materials:
Fe (23,5%) Ni (17,8%) S (16,8%) C (14,1%) Mn (9,7%) P (9,0%) Zr (2,7%) As (2,2%) Nb (1,6%) Ru (1,5%) Hg (1,0%)
Systease EC-D d12-3 C 2 / High metal content world
Distance to arrival:
59 028 ls
Estimated value:
13 452 cr

Earth masses:
0,1623
Radius:
3 475 km

Surface pressure:
0,04 Atmospheres

Gravity:
0,55 G

Volcanism:
No volcanism
Atmosphere:
Hot thin Sulphur dioxide
Terraforming state:
Not terraformable

Surface temperature:
503 K
Systease EC-D d12-3 C 3 / High metal content world
Distance to arrival:
58 988 ls
Estimated value:
13 100 cr

Earth masses:
0,0998
Radius:
2 975 km

Surface pressure:
0,01 Atmospheres

Gravity:
0,46 G

Volcanism:
Major Rocky Magma
Atmosphere:
Thin Sulphur dioxide
Terraforming state:
Not terraformable

Surface temperature:
365 K
Systease EC-D d12-3 C 4 / High metal content world (Landable)
Distance to arrival:
58 988 ls
Estimated value:
12 523 cr

Earth masses:
0,0399
Radius:
2 218 km

Gravity:
0,33 G

Volcanism:
Minor Metallic Magma
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
363 K

Materials:
Fe (21,9%) Ni (16,6%) S (15,6%) C (13,1%) Cr (9,9%) Mn (9,1%) P (8,4%) As (2,1%) Cd (1,7%) Hg (1,0%) Po (0,6%)
Systease EC-D d12-3 C 5 / High metal content world (Landable)
Distance to arrival:
58 980 ls
Estimated value:
12 770 cr

Earth masses:
0,0603
Radius:
2 533 km

Gravity:
0,38 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
315 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%) Y (1,3%) W (1,2%) Hg (1,0%)
Systease EC-D d12-3 C 6 / High metal content world (Landable)
Distance to arrival:
58 980 ls
Estimated value:
12 737 cr

Earth masses:
0,0572
Radius:
2 490 km

Gravity:
0,38 G

Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable

Surface temperature:
315 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%) Te (1,2%) Hg (0,9%)
Systease EC-D d12-3 C 7 / High metal content world
Distance to arrival:
59 085 ls
Estimated value:
12 469 cr

Earth masses:
0,0363
Radius:
2 151 km

Surface pressure:
2,58 Atmospheres

Gravity:
0,32 G

Volcanism:
No volcanism
Atmosphere:
Hot Water
Terraforming state:
Not terraformable

Surface temperature:
644 K