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