Leeuw system (Hipparcos 53756)
RogerBW
1 Interstellar navigation
Destination
|
θ
|
ϕ
|
ρ
|
K
|
52 Psi Ursae Majoris (Arbuthnot) K1III (United Kingdom)
|
104
|
61
|
3.8
|
87
|
HIP:53051 (Taylor) G5 (United Kingdom)
|
132
|
0
|
1.1
|
165
|
HIP:57346 (Leat) K4/5V (United Kingdom)
|
30
|
9
|
0.58
|
222
|
HR 4285 (Fletcher) F9V (United Kingdom)
|
180
|
64
|
1.7
|
131
|
To →
|
52 Psi Ursae Majoris (Arbuthnot)
|
HIP:53051 (Taylor)
|
HIP:57346 (Leat)
|
HR 4285 (Fletcher)
|
From ↓
|
θ
|
ϕ
|
ρ
|
θ
|
ϕ
|
ρ
|
θ
|
ϕ
|
ρ
|
θ
|
ϕ
|
ρ
|
52 Psi Ursae Majoris (Arbuthnot)
|
|
|
|
1
|
-72
|
3.5
|
48
|
-61
|
3.7
|
7
|
-45
|
2.5
|
HIP:53051 (Taylor)
|
74
|
72
|
3.5
|
|
|
|
84
|
4
|
1.3
|
15
|
62
|
1.7
|
HIP:57346 (Leat)
|
122
|
61
|
3.7
|
158
|
-4
|
1.3
|
|
|
|
299
|
48
|
1.9
|
HR 4285 (Fletcher)
|
80
|
45
|
2.5
|
88
|
-62
|
1.7
|
13
|
-48
|
1.9
|
|
|
|
2 System map
ID #
|
orbit
|
|
world type
|
size/e
|
mass/e
|
g/e
|
atmosphere
|
|
hydrographics
|
temp
|
climate
|
day
|
HI
|
RVM
|
Affinity
|
|
(a.u.)
|
(10Mm)
|
|
|
|
|
|
|
|
|
(C)
|
|
(hours)
|
|
|
|
I
|
0.08
|
|
medium gas giant
|
10.0
|
200
|
2.0
|
superdense corrosive
|
|
|
|
|
|
474
|
|
|
|
|
0.24
|
|
asteroid belt
|
|
|
|
|
|
|
|
76
|
infernal
|
|
0
|
0
|
0
|
II
|
0.40
|
|
standard garden planet
|
0.77
|
0.41
|
0.69
|
very thin breathable
|
|
40%
|
water
|
9
|
cool
|
infinite
|
5
|
-2
|
3
|
|
0.58
|
|
jump point Leat
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.68
|
|
asteroid belt
|
|
|
|
|
|
|
|
-68
|
frozen
|
|
0
|
1
|
1
|
|
1.1
|
|
jump point Taylor
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.7
|
|
jump point Fletcher
|
|
|
|
|
|
|
|
|
|
|
|
|
|
III
|
2.2
|
|
medium gas giant
|
9.2
|
150
|
1.8
|
superdense corrosive
|
|
|
|
|
|
143
|
|
|
|
|
|
|
7 moonlets
|
|
|
|
|
|
|
|
-159
|
frozen
|
|
0
|
0
|
0
|
IIIa
|
|
59
|
tiny sulfur moon
|
0.38
|
0.02
|
0.15
|
none
|
|
|
|
-182
|
frozen
|
103
|
-2
|
0
|
-2
|
IIIb
|
|
65
|
small ice moon
|
0.47
|
0.04
|
0.19
|
very dense mildly toxic
|
|
30%
|
hydrocarbons
|
-151
|
frozen
|
119
|
-1
|
0
|
-1
|
IIIc
|
|
73
|
standard ice moon
|
0.59
|
0.21
|
0.59
|
thin suffocating
|
|
|
|
-154
|
frozen
|
143
|
-1
|
0
|
-1
|
IIId
|
|
85
|
small ice moon
|
0.50
|
0.04
|
0.15
|
very dense mildly toxic
|
|
80%
|
hydrocarbons
|
-149
|
frozen
|
178
|
-1
|
-1
|
-2
|
IIIe
|
|
96
|
standard ice moon
|
0.38
|
0.06
|
0.42
|
very thin suffocating
|
|
|
|
-156
|
frozen
|
212
|
0
|
0
|
0
|
|
|
|
3 moonlets
|
|
|
|
|
|
|
|
-159
|
frozen
|
|
0
|
-1
|
-1
|
|
3.8
|
|
jump point Arbuthnot
|
|
|
|
|
|
|
|
|
|
|
|
|
|
IV
|
4.0
|
|
small gas giant
|
3.9
|
15
|
1.0
|
superdense corrosive
|
|
|
|
|
|
12.1
|
|
|
|
|
|
|
7 moonlets
|
|
|
|
|
|
|
|
-188
|
frozen
|
|
0
|
0
|
0
|
IVa
|
|
44
|
tiny sulfur moon
|
0.19
|
0.00
|
0.09
|
none
|
|
|
|
-205
|
frozen
|
212
|
-2
|
1
|
-1
|
|
|
|
5 moonlets
|
|
|
|
|
|
|
|
-188
|
frozen
|
|
0
|
0
|
0
|
V
|
6.7
|
|
small gas giant
|
4.5
|
20
|
0.99
|
superdense corrosive
|
|
|
|
|
|
250
|
|
|
|
|
|
|
8 moonlets
|
|
|
|
|
|
|
|
-208
|
frozen
|
|
0
|
0
|
0
|
Va
|
|
46
|
small hadean moon
|
0.38
|
0.02
|
0.15
|
none
|
|
|
|
-228
|
frozen
|
193
|
0
|
-1
|
-1
|
Vb
|
|
55
|
standard hadean moon
|
0.66
|
0.12
|
0.26
|
none
|
|
|
|
-228
|
frozen
|
250
|
0
|
-2
|
-2
|
Vc
|
|
65
|
small hadean moon
|
0.33
|
0.02
|
0.16
|
none
|
|
|
|
-228
|
frozen
|
328
|
0
|
0
|
0
|
Vd
|
|
80
|
small hadean moon
|
0.29
|
0.01
|
0.14
|
none
|
|
|
|
-228
|
frozen
|
440
|
0
|
0
|
0
|
|
|
|
1 moonlet
|
|
|
|
|
|
|
|
-208
|
frozen
|
|
0
|
0
|
0
|
VI
|
13
|
|
medium gas giant
|
10
|
250
|
2.3
|
superdense corrosive
|
|
|
|
|
|
18.2
|
|
|
|
|
|
|
3 moonlets
|
|
|
|
|
|
|
|
-226
|
frozen
|
|
0
|
0
|
0
|
VIa
|
|
106
|
tiny sulfur moon
|
0.09
|
0.00
|
0.05
|
none
|
|
|
|
-235
|
frozen
|
193
|
-2
|
1
|
-1
|
VIb
|
|
127
|
small hadean moon
|
0.27
|
0.01
|
0.13
|
none
|
|
|
|
-240
|
frozen
|
251
|
0
|
-2
|
-2
|
VIc
|
|
152
|
small hadean moon
|
0.24
|
0.01
|
0.12
|
none
|
|
|
|
-240
|
frozen
|
327
|
0
|
0
|
0
|
VId
|
|
191
|
tiny ice moon
|
0.22
|
0.00
|
0.09
|
none
|
|
|
|
-231
|
frozen
|
463
|
0
|
0
|
0
|
|
|
|
3 moonlets
|
|
|
|
|
|
|
|
-226
|
frozen
|
|
0
|
1
|
1
|
VII
|
22
|
|
medium gas giant
|
11
|
350
|
2.8
|
superdense corrosive
|
|
|
|
|
|
13.4
|
|
|
|
|
|
|
5 moonlets
|
|
|
|
|
|
|
|
-237
|
frozen
|
|
0
|
0
|
0
|
VIIa
|
|
57
|
tiny sulfur moon
|
0.12
|
0.00
|
0.05
|
none
|
|
|
|
-244
|
frozen
|
63.8
|
-1
|
0
|
-1
|
VIIb
|
|
63
|
tiny ice moon
|
0.19
|
0.00
|
0.08
|
none
|
|
|
|
-241
|
frozen
|
73.5
|
0
|
0
|
0
|
VIIc
|
|
70
|
tiny ice moon
|
0.14
|
0.00
|
0.05
|
none
|
|
|
|
-241
|
frozen
|
86.2
|
0
|
0
|
0
|
VIId
|
|
78
|
small hadean moon
|
0.22
|
0.01
|
0.11
|
none
|
|
|
|
-248
|
frozen
|
101
|
0
|
-1
|
-1
|
VIIe
|
|
87
|
tiny ice moon
|
0.08
|
0.00
|
0.03
|
none
|
|
|
|
-241
|
frozen
|
121
|
0
|
-1
|
-1
|
VIIf
|
|
97
|
tiny ice moon
|
0.11
|
0.00
|
0.03
|
none
|
|
|
|
-241
|
frozen
|
141
|
0
|
0
|
0
|
|
|
|
3 moonlets
|
|
|
|
|
|
|
|
-237
|
frozen
|
|
0
|
0
|
0
|
3 Habitation
British colony founded 2345.
The main inhabited body is the second planet, which has a cool but breathable atmosphere, though it’s tidally locked to the primary.
3.1 Planetology
class of star
|
K5 V
|
|
mean distance
|
0.40
|
a.u.
|
perihelion
|
0.20
|
a.u.
|
aphelion
|
0.60
|
a.u.
|
axial tilt
|
36°
|
|
annual period
|
0.315
|
years
|
tidelocked
|
|
|
local day
|
infinite
|
|
|
|
|
standard garden planet
|
|
|
diameter
|
0.77
|
x Earth’s
|
|
9834
|
km
|
density
|
0.90
|
x Earth’s
|
|
5.0
|
g/cm^3
|
surface gravity
|
0.69
|
g.
|
|
6.8
|
m/s^2
|
escape velocity
|
8.2
|
km/s
|
vulcanism
|
light
|
|
tectonics
|
none
|
|
climate
|
cool
|
|
temperature
|
|
|
average
|
9
|
C
|
dayside
|
54
|
C
|
nightside
|
-84
|
C
|
illumination
|
56
|
% Earth’s
|
oceans
|
40%
|
|
composition
|
water
|
|
tidal range
|
0.00
|
m
|
atmosphere
|
|
|
main gases
|
N2, O2
|
|
traces &c.
|
|
|
class
|
breathable
|
|
pressure
|
0.69
|
bar
|
|
(very thin)
|
|
Population & economy
|
|
|
Habitability
|
5
|
|
|
|
|
|
|
|
|
|
Resources
|
very poor
|
|
RVM
|
-2
|
|
|
|
|
|
|
|
|
|
|
|
|
Affinity
|
3
|
|
|
|
|
|
|
|
|
|
carrying capacity
|
|
1.2 E+8
|
|
|
|
|
|
|
|
|
|
|
|
Sky Objects
Object
|
|
size
|
period
|
tides
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class
|
(degrees)
|
(hours)
|
(m)
|
|
|
|
|
|
|
|
|
|
|
|
|
sun:
|
K5 V
|
0.91
|
infinite
|
|
|
|
|
|
|
|
|
|
|
|
|
|
4 Economy
There is some mineral extraction for local use, and extensive food production.