Eol Prou XK-N d7-1759 [#60447226990915]
Eol Prou XK-N d7-1759 A
/ G (White-Yellow) Star
(Scoopable)
Distance to arrival:
0 ls
Estimated value:
1,217 cr
Solar masses:
0.9180
Solar radius:
0.9378
Age:
1,716 million years
Luminosity:
Vab
Surface temperature:
5,532 K
Eol Prou XK-N d7-1759 AB 1
/ High metal content world
Distance to arrival:
384 ls
Estimated value:
171,853 cr
Earth masses:
0.9287
Radius:
5,954 km
Surface pressure:
156.30 Atmospheres
Gravity:
1.07 G
Volcanism:
Major Rocky Magma
Atmosphere:
Hot thick Carbon dioxide
Terraforming state:
Candidate for terraforming
Surface temperature:
839 K
Eol Prou XK-N d7-1759 AB 2
/ Class II gas giant
Distance to arrival:
1,706 ls
Estimated value:
28,857 cr
Earth masses:
536.4741
Radius:
76,052 km
Gravity:
3.77 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
211 K
Eol Prou XK-N d7-1759 AB 2 a
/ Rocky body
(Landable)
Distance to arrival:
1,709 ls
Estimated value:
500 cr
Earth masses:
0.0034
Radius:
1,052 km
Surface pressure:
0.03 Atmospheres
Gravity:
0.12 G
Volcanism:
No volcanism
Atmosphere:
Thin Carbon dioxide
Terraforming state:
Not terraformable
Surface temperature:
181 K
Materials:
Fe
(18.7%)
S
(18.2%)
C
(15.3%)
Ni
(14.1%)
P
(9.8%)
Cr
(8.4%)
Mn
(7.7%)
Zn
(5.1%)
Cd
(1.5%)
Hg
(0.8%)
Po
(0.5%)
Eol Prou XK-N d7-1759 AB 2 b
/ Rocky body
(Landable)
Distance to arrival:
1,705 ls
Estimated value:
500 cr
Earth masses:
0.0016
Radius:
828 km
Surface pressure:
0.02 Atmospheres
Gravity:
0.10 G
Volcanism:
No volcanism
Atmosphere:
Thin Carbon dioxide
Terraforming state:
Not terraformable
Surface temperature:
173 K
Materials:
Fe
(19.6%)
S
(19.3%)
C
(16.2%)
Ni
(14.9%)
P
(10.4%)
Mn
(8.1%)
V
(4.8%)
Se
(3.0%)
Te
(1.5%)
Sn
(1.2%)
W
(1.1%)
Eol Prou XK-N d7-1759 AB 2 c
/ Rocky body
(Landable)
Distance to arrival:
1,713 ls
Estimated value:
500 cr
Earth masses:
0.0040
Radius:
1,110 km
Surface pressure:
0.03 Atmospheres
Gravity:
0.13 G
Volcanism:
No volcanism
Atmosphere:
Thin Carbon dioxide
Terraforming state:
Not terraformable
Surface temperature:
177 K
Materials:
Fe
(19.7%)
S
(19.2%)
C
(16.1%)
Ni
(14.9%)
P
(10.3%)
Mn
(8.1%)
Zn
(5.4%)
Se
(3.0%)
Sb
(1.2%)
Sn
(1.2%)
Hg
(0.9%)
Eol Prou XK-N d7-1759 AB 2 c a
/ Rocky body
Distance to arrival:
1,713 ls
Estimated value:
500 cr
Earth masses:
0.0002
Radius:
402 km
Surface pressure:
0.39 Atmospheres
Gravity:
0.04 G
Volcanism:
No volcanism
Atmosphere:
Carbon dioxide
Terraforming state:
Not terraformable
Surface temperature:
220 K
Eol Prou XK-N d7-1759 AB 2 d
/ Rocky body
(Landable)
Distance to arrival:
1,695 ls
Estimated value:
500 cr
Earth masses:
0.0029
Radius:
999 km
Surface pressure:
0.03 Atmospheres
Gravity:
0.12 G
Volcanism:
No volcanism
Atmosphere:
Thin Carbon dioxide
Terraforming state:
Not terraformable
Surface temperature:
173 K
Materials:
Fe
(18.6%)
S
(18.2%)
C
(15.3%)
Ni
(14.1%)
P
(9.8%)
Cr
(8.4%)
Mn
(7.7%)
V
(4.6%)
Cd
(1.5%)
Ru
(1.2%)
Hg
(0.8%)
Eol Prou XK-N d7-1759 AB 2 e
/ Rocky body
(Landable)
Distance to arrival:
1,703 ls
Estimated value:
500 cr
Earth masses:
0.0021
Radius:
900 km
Surface pressure:
0.02 Atmospheres
Gravity:
0.11 G
Volcanism:
No volcanism
Atmosphere:
Thin Carbon dioxide
Terraforming state:
Not terraformable
Surface temperature:
170 K
Materials:
Fe
(20.1%)
S
(19.7%)
C
(16.6%)
Ni
(15.2%)
P
(10.6%)
Ge
(5.8%)
Zn
(5.5%)
As
(2.6%)
Cd
(1.6%)
Mo
(1.3%)
Y
(1.2%)
Eol Prou XK-N d7-1759 AB 3
/ Class I gas giant
Distance to arrival:
2,246 ls
Estimated value:
4,153 cr
Earth masses:
134.2453
Radius:
62,461 km
Reserve level:
Pristine
Gravity:
1.40 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
131 K
Eol Prou XK-N d7-1759 AB 3 a
/ Icy body
(Landable)
Distance to arrival:
2,246 ls
Estimated value:
500 cr
Earth masses:
0.0022
Radius:
1,153 km
Gravity:
0.07 G
Volcanism:
Minor Carbon Dioxide Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
109 K
Materials:
S
(27.0%)
C
(22.7%)
P
(14.5%)
Fe
(11.9%)
Ni
(9.0%)
Cr
(5.4%)
Se
(4.2%)
Zn
(3.2%)
Nb
(0.8%)
Ru
(0.7%)
Hg
(0.5%)
Eol Prou XK-N d7-1759 AB 4
/ Class I gas giant
Distance to arrival:
2,263 ls
Estimated value:
3,463 cr
Earth masses:
26.6395
Radius:
41,910 km
Reserve level:
Pristine
Gravity:
0.62 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
120 K
Eol Prou XK-N d7-1759 AB 4 a
/ Icy body
(Landable)
Distance to arrival:
2,263 ls
Estimated value:
500 cr
Earth masses:
0.0021
Radius:
1,134 km
Gravity:
0.07 G
Volcanism:
Major Water Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
107 K
Materials:
S
(26.6%)
C
(22.4%)
P
(14.3%)
Fe
(12.0%)
Ni
(9.1%)
Cr
(5.4%)
Mn
(5.0%)
V
(3.0%)
Te
(0.9%)
Mo
(0.8%)
Hg
(0.5%)
Eol Prou XK-N d7-1759 AB 4 b
/ Icy body
(Landable)
Distance to arrival:
2,264 ls
Estimated value:
500 cr
Earth masses:
0.0004
Radius:
665 km
Gravity:
0.04 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
107 K
Materials:
S
(27.8%)
C
(23.4%)
P
(15.0%)
Fe
(12.5%)
Ni
(9.5%)
Se
(4.4%)
Ge
(3.7%)
As
(1.6%)
Cd
(1.0%)
Mo
(0.8%)
Po
(0.3%)
Eol Prou XK-N d7-1759 AB 5
/ Class I gas giant
Distance to arrival:
3,273 ls
Estimated value:
3,357 cr
Earth masses:
19.7144
Radius:
21,831 km
Gravity:
1.68 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
101 K
Eol Prou XK-N d7-1759 AB 5 a
/ Icy body
(Landable)
Distance to arrival:
3,272 ls
Estimated value:
500 cr
Earth masses:
0.0001
Radius:
450 km
Gravity:
0.03 G
Volcanism:
Major Water Magma
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
90 K
Materials:
S
(28.0%)
C
(23.6%)
P
(15.1%)
Fe
(12.5%)
Ni
(9.5%)
Se
(4.4%)
Zn
(3.4%)
Zr
(1.5%)
Mo
(0.8%)
Sn
(0.8%)
Tc
(0.5%)
Eol Prou XK-N d7-1759 AB 5 b
/ Icy body
(Landable)
Distance to arrival:
3,272 ls
Estimated value:
500 cr
Earth masses:
0.0004
Radius:
628 km
Gravity:
0.04 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
90 K
Materials:
S
(26.2%)
C
(22.0%)
P
(14.1%)
Fe
(11.9%)
Ni
(9.0%)
Cr
(5.4%)
Mn
(4.9%)
Se
(4.1%)
Cd
(0.9%)
Te
(0.9%)
Sn
(0.7%)
Eol Prou XK-N d7-1759 AB 5 c
/ Icy body
(Landable)
Distance to arrival:
3,274 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:
90 K
Materials:
S
(26.9%)
C
(22.6%)
P
(14.5%)
Fe
(12.0%)
Ni
(9.1%)
Mn
(5.0%)
Se
(4.2%)
Zn
(3.3%)
Cd
(0.9%)
Mo
(0.8%)
Ru
(0.7%)
Eol Prou XK-N d7-1759 AB 5 d
/ Icy body
(Landable)
Distance to arrival:
3,270 ls
Estimated value:
500 cr
Earth masses:
0.0001
Radius:
454 km
Gravity:
0.03 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
90 K
Materials:
S
(26.8%)
C
(22.6%)
P
(14.5%)
Fe
(12.0%)
Ni
(9.1%)
Mn
(5.0%)
Se
(4.2%)
Ge
(3.5%)
Cd
(0.9%)
Mo
(0.8%)
Y
(0.7%)
Eol Prou XK-N d7-1759 AB 5 e
/ Icy body
(Landable)
Distance to arrival:
3,273 ls
Estimated value:
500 cr
Earth masses:
0.0005
Radius:
721 km
Gravity:
0.04 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
90 K
Materials:
S
(26.3%)
C
(22.1%)
P
(14.1%)
Fe
(11.9%)
Ni
(9.0%)
Cr
(5.4%)
Mn
(4.9%)
Se
(4.1%)
Cd
(0.9%)
Y
(0.7%)
W
(0.7%)
Eol Prou XK-N d7-1759 AB 5 f
/ Icy body
(Landable)
Distance to arrival:
3,280 ls
Estimated value:
500 cr
Earth masses:
0.0003
Radius:
575 km
Gravity:
0.03 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
90 K
Materials:
S
(27.7%)
C
(23.3%)
P
(14.9%)
Fe
(12.4%)
Ni
(9.4%)
Cr
(5.6%)
V
(3.0%)
As
(1.6%)
Te
(0.9%)
Mo
(0.8%)
Hg
(0.5%)
Eol Prou XK-N d7-1759 AB 5 g
/ Icy body
(Landable)
Distance to arrival:
3,272 ls
Estimated value:
500 cr
Earth masses:
0.0002
Radius:
503 km
Gravity:
0.03 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
90 K
Materials:
S
(26.5%)
C
(22.3%)
P
(14.3%)
Fe
(11.9%)
Ni
(9.0%)
Cr
(5.3%)
Mn
(4.9%)
Ge
(3.5%)
Cd
(0.9%)
Mo
(0.8%)
Y
(0.7%)
Eol Prou XK-N d7-1759 B
/ K (Yellow-Orange) Star
(Scoopable)
Distance to arrival:
108 ls
Estimated value:
1,209 cr
Solar masses:
0.4961
Solar radius:
0.6891
Age:
1,716 million years
Luminosity:
Va
Surface temperature:
4,011 K
Eol Prou XK-N d7-1759 C
/ M (Red dwarf) Star
(Scoopable)
Distance to arrival:
79,743 ls
Estimated value:
1,207 cr
Solar masses:
0.3711
Solar radius:
0.5575
Age:
1,716 million years
Luminosity:
Va
Surface temperature:
3,320 K
Eol Prou XK-N d7-1759 C A Belt
Class:
Rocky
Mass:
85,248,000,000,000 Mt
Inner radius:
639,800 km
Outer radius:
1,832,200 km
Eol Prou XK-N d7-1759 C B Belt
Class:
Icy
Mass:
2,506,300,000,000,000 Mt
Inner radius:
2,041,700 km
Outer radius:
313,540,000 km
Eol Prou XK-N d7-1759 C 1
/ Class I gas giant
Distance to arrival:
78,308 ls
Estimated value:
4,530 cr
Earth masses:
271.4574
Radius:
71,339 km
Gravity:
2.17 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
109 K
Eol Prou XK-N d7-1759 C 1 a
/ Icy body
(Landable)
Distance to arrival:
78,309 ls
Estimated value:
500 cr
Earth masses:
0.0020
Radius:
1,107 km
Gravity:
0.07 G
Volcanism:
Major Water Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
77 K
Materials:
S
(27.6%)
C
(23.2%)
P
(14.8%)
Fe
(12.3%)
Ni
(9.3%)
Cr
(5.6%)
Ge
(3.6%)
Zr
(1.4%)
Ru
(0.8%)
Sn
(0.7%)
W
(0.7%)
Eol Prou XK-N d7-1759 C 1 b
/ Icy body
(Landable)
Distance to arrival:
78,309 ls
Estimated value:
500 cr
Earth masses:
0.0020
Radius:
1,105 km
Gravity:
0.07 G
Volcanism:
Major Water Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
77 K
Materials:
S
(26.9%)
C
(22.6%)
P
(14.5%)
Fe
(12.0%)
Ni
(9.1%)
Cr
(5.4%)
Se
(4.2%)
V
(3.0%)
Cd
(0.9%)
Sn
(0.7%)
Y
(0.7%)
Eol Prou XK-N d7-1759 C 1 c
/ Icy body
(Landable)
Distance to arrival:
78,305 ls
Estimated value:
500 cr
Earth masses:
0.0017
Radius:
1,050 km
Gravity:
0.06 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
73 K
Materials:
S
(26.6%)
C
(22.4%)
P
(14.3%)
Fe
(11.9%)
Ni
(9.0%)
Cr
(5.4%)
Mn
(4.9%)
Ge
(3.5%)
Nb
(0.8%)
Y
(0.7%)
W
(0.7%)
Eol Prou XK-N d7-1759 C 1 d
/ Icy body
(Landable)
Distance to arrival:
78,311 ls
Estimated value:
500 cr
Earth masses:
0.0012
Radius:
944 km
Gravity:
0.06 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
72 K
Materials:
S
(26.6%)
C
(22.4%)
P
(14.3%)
Fe
(11.9%)
Ni
(9.0%)
Cr
(5.4%)
Mn
(4.9%)
Zn
(3.2%)
Cd
(0.9%)
Sb
(0.7%)
Sn
(0.7%)
Eol Prou XK-N d7-1759 C 1 e
/ Icy body
Distance to arrival:
78,313 ls
Estimated value:
500 cr
Earth masses:
0.0013
Radius:
974 km
Surface pressure:
0.16 Atmospheres
Gravity:
0.06 G
Volcanism:
No volcanism
Atmosphere:
Methane
Terraforming state:
Not terraformable
Surface temperature:
113 K
Eol Prou XK-N d7-1759 C 1 f
/ Icy body
Distance to arrival:
78,300 ls
Estimated value:
500 cr
Earth masses:
0.0067
Radius:
1,651 km
Surface pressure:
0.47 Atmospheres
Gravity:
0.10 G
Volcanism:
No volcanism
Atmosphere:
Methane
Terraforming state:
Not terraformable
Surface temperature:
126 K
Eol Prou XK-N d7-1759 C 2
/ Class I gas giant
Distance to arrival:
79,729 ls
Estimated value:
3,904 cr
Earth masses:
79.4382
Radius:
57,001 km
Gravity:
0.99 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
74 K
Eol Prou XK-N d7-1759 C 2 a
/ Icy body
Distance to arrival:
79,730 ls
Estimated value:
500 cr
Earth masses:
0.0004
Radius:
673 km
Surface pressure:
7.49 Atmospheres
Gravity:
0.04 G
Volcanism:
Major Water Geysers
Atmosphere:
Thick Methane
Terraforming state:
Not terraformable
Surface temperature:
153 K
Eol Prou XK-N d7-1759 C 2 b
/ Icy body
Distance to arrival:
79,730 ls
Estimated value:
500 cr
Earth masses:
0.0016
Radius:
1,025 km
Surface pressure:
2.67 Atmospheres
Gravity:
0.06 G
Volcanism:
Major Water Geysers
Atmosphere:
Methane
Terraforming state:
Not terraformable
Surface temperature:
133 K
Eol Prou XK-N d7-1759 C 2 c
/ Icy body
Distance to arrival:
79,730 ls
Estimated value:
500 cr
Earth masses:
0.0006
Radius:
753 km
Surface pressure:
9.41 Atmospheres
Gravity:
0.04 G
Volcanism:
Major Water Geysers
Atmosphere:
Thick Methane
Terraforming state:
Not terraformable
Surface temperature:
155 K
Eol Prou XK-N d7-1759 C 2 d
/ Icy body
Distance to arrival:
79,731 ls
Estimated value:
500 cr
Earth masses:
0.0007
Radius:
801 km
Surface pressure:
2.28 Atmospheres
Gravity:
0.05 G
Volcanism:
No volcanism
Atmosphere:
Methane
Terraforming state:
Not terraformable
Surface temperature:
130 K
Eol Prou XK-N d7-1759 C 2 e
/ Icy body
Distance to arrival:
79,728 ls
Estimated value:
500 cr
Earth masses:
0.0009
Radius:
865 km
Surface pressure:
0.12 Atmospheres
Gravity:
0.05 G
Volcanism:
No volcanism
Atmosphere:
Methane
Terraforming state:
Not terraformable
Surface temperature:
94 K
Eol Prou XK-N d7-1759 C 2 f
/ Icy body
(Landable)
Distance to arrival:
79,733 ls
Estimated value:
500 cr
Earth masses:
0.0010
Radius:
872 km
Gravity:
0.05 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
61 K
Materials:
S
(27.7%)
C
(23.3%)
P
(14.9%)
Fe
(12.4%)
Ni
(9.4%)
Cr
(5.6%)
V
(3.0%)
Zr
(1.4%)
Cd
(1.0%)
Sb
(0.8%)
W
(0.7%)
Eol Prou XK-N d7-1759 C 2 g
/ Icy body
(Landable)
Distance to arrival:
79,732 ls
Estimated value:
500 cr
Earth masses:
0.0012
Radius:
943 km
Gravity:
0.06 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
61 K
Materials:
S
(28.2%)
C
(23.7%)
P
(15.2%)
Fe
(12.6%)
Ni
(9.5%)
Mn
(5.2%)
As
(1.6%)
Zr
(1.5%)
Cd
(1.0%)
Mo
(0.8%)
Y
(0.8%)
Eol Prou XK-N d7-1759 C 3
/ Class I gas giant
Distance to arrival:
79,608 ls
Estimated value:
3,683 cr
Earth masses:
47.3061
Radius:
48,956 km
Gravity:
0.80 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
63 K
Eol Prou XK-N d7-1759 C 3 a
/ Icy body
(Landable)
Distance to arrival:
79,609 ls
Estimated value:
500 cr
Earth masses:
0.0004
Radius:
675 km
Gravity:
0.04 G
Volcanism:
Major Water Geysers
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
55 K
Materials:
S
(26.4%)
C
(22.2%)
P
(14.2%)
Fe
(11.8%)
Ni
(8.9%)
Cr
(5.3%)
Mn
(4.9%)
Se
(4.1%)
Te
(0.9%)
Sn
(0.7%)
W
(0.7%)
Eol Prou XK-N d7-1759 C 3 b
/ Icy body
(Landable)
Distance to arrival:
79,607 ls
Estimated value:
500 cr
Earth masses:
0.0005
Radius:
696 km
Gravity:
0.04 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
55 K
Materials:
S
(27.2%)
C
(22.9%)
P
(14.6%)
Fe
(12.2%)
Ni
(9.2%)
Mn
(5.0%)
Se
(4.3%)
V
(3.0%)
Sn
(0.7%)
W
(0.7%)
Po
(0.3%)
Eol Prou XK-N d7-1759 C 3 c
/ Icy body
(Landable)
Distance to arrival:
79,605 ls
Estimated value:
500 cr
Earth masses:
0.0002
Radius:
523 km
Surface pressure:
0.00 Atmospheres
Gravity:
0.03 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
54 K
Materials:
S
(26.5%)
C
(22.3%)
P
(14.3%)
Fe
(11.9%)
Ni
(9.0%)
Cr
(5.3%)
Mn
(4.9%)
Ge
(3.5%)
Nb
(0.8%)
Mo
(0.8%)
Sb
(0.7%)
Eol Prou XK-N d7-1759 C 3 d
/ Icy body
(Landable)
Distance to arrival:
79,612 ls
Estimated value:
500 cr
Earth masses:
0.0005
Radius:
698 km
Surface pressure:
0.00 Atmospheres
Gravity:
0.04 G
Volcanism:
No volcanism
Atmosphere:
No atmosphere
Terraforming state:
Not terraformable
Surface temperature:
54 K
Materials:
S
(26.6%)
C
(22.4%)
P
(14.3%)
Fe
(12.0%)
Ni
(9.1%)
Cr
(5.4%)
Mn
(5.0%)
V
(3.0%)
Nb
(0.8%)
Ru
(0.7%)
W
(0.7%)
Eol Prou XK-N d7-1759 C 4
/ Icy body
Distance to arrival:
79,629 ls
Estimated value:
507 cr
Earth masses:
2.6836
Radius:
10,399 km
Surface pressure:
0.51 Atmospheres
Reserve level:
Pristine
Gravity:
1.01 G
Volcanism:
Major Water Geysers
Atmosphere:
Helium
Terraforming state:
Not terraformable
Surface temperature:
55 K