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OSCAR 27 (18361)
COSPAR: 1987-080A | Alt Name: NNS 30270-07
Image
Additional Sources
Launch Details
Launch Date
September 16, 1987
Launch Site
AFWTR
Launch Pad
SLC5
Launch Vehicle
Scout G-1
Orbital Elements
NORAD ID
18361
International Designator
1987-080A
Epoch
Sat, 04 Jul 2026 02:19:30 GMT
Apogee
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Perigee
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Inclination
90.37°
Right Ascension
86.78°
Eccentricity
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Argument of Perigee
3.30°
Period
107.07 min
Mean Motion
13.45 rev/day
Latitude
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Longitude
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Altitude
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Velocity
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Polar Plot
3D Visualization
Basic Satellite Info
Name
OSCAR 27
Alternative Name
NNS 30270-07
Type
Payload
Status
Unknown
Owner
NAVAIR
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 18361U 87080A 26185.09688515 .00000116 00000-0 17838-3 0 9994
2 18361 90.3711 86.7815 0104231 3.2984 356.8828 13.44944741902905
Source: Celestrak
Summary
OSCAR 27 (NORAD CAT ID: 18361, OBJECT ID: 1987-080A) is a navigation satellite launched by the US on September 16, 1987, from AFWTR SLC5 using a Scout G-1 launch vehicle. It measures 0.3 meters in length and has a diameter of 0.5 meters with a span of 30 meters. The spacecraft has a dry mass of 66 kilograms, which is the same as its launch mass. The satellite is known by its alternate name NNS 30270-07 and operates under the ownership of NAVAIR with the payload designated as NNS O-27. It features a configuration based on the Transit-Bus design and uses gravity stabilization. Power is provided by four deployable fixed solar arrays and batteries. The satellite's shape consists of an octagonal cylinder with four panels and antennas, and its radar cross-section (RCS) is 1.4209 square meters. It was manufactured by GEEW for navigation purposes but does not have additional information on equipment or motor specifications provided.
Physical Characteristics
Length
0.3
Diameter
0.5
Span
30
Dry Mass
66
Launch Mass
66
Shape
Oct Cyl + 4 Pan + Ant
Radar Cross Section
1.4209
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
NNS O-27
Purpose
Navigation
Mission
Navigation
Manufacturer
GEEW
Life Expectancy
Unknown
Bus
Transit 5
Configuration
Transit-Bus, Gravity Stabilized
Motor
?
Equipment
?
Power System
4 deployable fixed solar arrays, batteries
ADCS
Unknown
Transmitter Frequency
Unknown
Map
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration
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