Venera 15

Short description: 1983 uncrewed Soviet spacecraft to Venus

Venera 15

Mission type| Venus orbiter
Operator| Soviet Academy of Sciences[1]
COSPAR ID| 1983-053A
SATCAT no.| 14104[2]
Mission duration|  Overall: 1 year, 1 month, 7 days
At Venus: 9 months
Spacecraft properties
Spacecraft type| 4V-2 No. 860[3]
Manufacturer| NPO Lavochkin[3]
Launch mass| 5,250 kg (11,570 lb)[3]
Dry mass| 4,000 kg (8,800 lb)
Start of mission
Launch date| June 2, 1983, 02:38:39 (1983-06-02UTC02:38:39) UTC[3]
Rocket| Proton-K/D-1[3]
Launch site| Baikonur 200/39[3]
End of mission
Last contact| January 5, 1985 (1985-01-06)[3]
Orbital parameters
Reference system| Cytherocentric
Semi-major axis| 38,848 kilometres (24,139 mi)
Eccentricity| 0.8211
Pericytherion altitude| 7,081 kilometres (4,400 mi)
Apocytherion altitude| 72,079 kilometres (44,788 mi)
Inclination| 92.5 degrees
Period| 24 hours
Epoch| October 9, 1983 (1983-10-09)[4]
Venus orbiter
Orbital insertion| October 10, 1983
Orbits| 260

Venera

<- Venera 14

Venera 16 ->

Venera 15 (Russian: Венера-15 meaning Venus 15) was a spacecraft sent to Venus by the Soviet Union. This uncrewed orbiter was to map the surface of Venus using high resolution imaging systems. The spacecraft was identical to Venera 16 and based on modifications to the earlier Venera space probes.

## Contents

* 1 Mission profile
* 2 Spacecraft structure
* 3 See also
* 4 References
* 5 External links

## Mission profile

Flight profile of Venera 15

Venera 15 was launched on June 2, 1983, at 02:38:39 UTC[3] and reached Venus' orbit on October 10, 1983.[5]

The spacecraft was inserted into Venus orbit a day apart from Venera 16, with its orbital plane shifted by an angle of approximately 4° relative to the other probe. This made it possible to reimage an area if necessary. The spacecraft was in a nearly polar orbit with a periapsis ~1000 km, at 62°N latitude, and apoapsis ~65000 km, with an inclination ~90°, the orbital period being ~24 hours.

Together with Venera 16, the spacecraft imaged the area from the north pole down to about 30°N latitude (approximately 25% of Venus surface) over the eight months of mapping operations.

## Spacecraft structure

The Venera 15 and 16 spacecraft were identical and were based on modifications to the Venera 9 orbiter and the Venera 14 carrier spacecraft. Each spacecraft consisted of a 5 m (16 ft) long cylinder with a 0.6 m (2.0 ft) diameter, 1.4 m (4.6 ft) tall parabolic dish antenna for the synthetic aperture radar (SAR) at one end. A 1-meter diameter parabolic dish antenna for the radio altimeter was also located at this end. The electrical axis of the radio altimeter antenna was lined up with the axis of the cylinder. The electrical axis of the SAR deviated from the spacecraft axis by 10 degrees. During imaging, the radio altimeter would be lined up with the center of the planet (local vertical) and the SAR would be looking off to the side at 10 degrees. A bulge at the opposite end of the cylinder held fuel tanks and propulsion units. Two square solar arrays extended like wings from the sides of the cylinder. A 2.6 m (8.5 ft) radio dish antenna for communications was also attached to the side of the cylinder. The spacecraft each massed 4,000 kg (8,800 lb).[1]

Both Venera 15 and 16 were equipped with a synthetic-aperture radar (SAR). A radar was necessary in this mission because nothing else would be able to penetrate the dense clouds of Venus. The probes were equipped with on board computers that saved the images until the entire image was complete. This radar system replaced the normal landers that previous Venera probes brought to Venus.

List of spacecraft instruments and experiments:

* Polyus-V Synthetic Aperture Radar
* Omega Radar altimeter
* Infrared Fourier Spectrometer
* Cosmic-Ray Detectors (6 sensors)
* Solar-Plasma Detectors

To get to Venus, Venera 15 was placed in a heliocentric orbit with perihelion of 0.71 AU, apohelion of 1.01 AU, eccentricity of 0.17, orbital inclination of 2.3 degrees and orbital period of 293 days.

## See also

* List of missions to Venus

## References

1. ↑ 1.0 1.1 "Venera 15". https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1983-053A.
2. ↑ "Venera 15". https://www.n2yo.com/satellite/?s=14104.
3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 Siddiqi, Asif A. (2018). Beyond Earth: A Chronicle of Deep Space Exploration, 1958–2016. The NASA history series (second ed.). Washington, DC: NASA History Program Office. p. 159. SP2018-4041. ISBN 9781626830424. https://www.nasa.gov/sites/default/files/atoms/files/beyond-earth-tagged.pdf.
4. ↑ "Venera 15 Launch and Orbital Information". https://nssdc.gsfc.nasa.gov/nmc/spacecraft/displayTrajectory.action?id=1983-053A.
5. ↑ "Missions to Venus and Mercury". https://www.planetary.org/explore/space-topics/space-missions/missions-to-venus-mercury.html#venera15.

## External links

* The Soviet Exploration of Venus
* Catalog of Soviet Venus images
* Venera 15/16 Radar Mosaic Browser

* v
* t
* e

Venera programme

Flybys|

* Venera 1
* Venera 2

Orbiters|

* Venera 15
* Venera 16

Descent probes|

* Venera 3
* Venera 4
* Venera 5
* Venera 6
* Venera 7

Landers|

* Venera 8
* Venera 9
* Venera 10
* Venera 11
* Venera 12
* Venera 13
* Venera 14

Failed launches|

* Tyazhely Sputnik
* Venera 2MV-1 No.1
* Venera 2MV-1 No.2
* Venera 2MV-2 No.1
* Kosmos 21
* Venera 3MV-1 No.2
* Kosmos 27
* Kosmos 96
* Kosmos 167
* Kosmos 359
* Kosmos 482
* Venera 1964A

Future missions|

* Venera-D

* v
* t
* e

Spacecraft missions to Venus

Active missions|

| Orbiters|

* Akatsuki

|

Flybys|

* Parker Solar Probe (en route)
* BepiColombo (en route)

Past missions|

| Orbiters|

* Magellan
* Pioneer Venus Orbiter
* Venera 9
* 10
* 15
* 16
* Venus Express

|

Flybys|

* Venera 1†
* Mariner 2
* Zond 1†
* Venera 2†
* Mariner 5
* 10
* Venera 11
* 12
* 13
* 14
* Vega 1
* 2
* Galileo
* Cassini–Huygens
* MESSENGER
* IKAROS
* Shin-en†

Descent probes|

* Venera 3†
* 4
* 5
* 6
* Pioneer Venus Multiprobe

Landers|

* Venera 7
* 8
* 9
* 10
* 11
* 12
* 13
* 14
* Vega 1
* 2
* Pioneer Venus Small Probes

Balloon probes|

* Vega 1
* 2

Failed launches|

* Tyazhely Sputnik
* Mariner 1
* 2MV-1 No.1
* 2MV-1 No.2
* 2MV-2 No.1
* Kosmos 21
* 3MV-1 No.2
* Kosmos 27
* 96
* 167
* 482

Planned missions|

| Flybys|

* Solar Orbiter (2020)
* Jupiter Icy Moons Explorer (2022)
* Dragonfly (2026)

|

Proposed missions|

| Venus missions|

* CUVE
* DAVINCI
* EnVision
* HAVOC
* HOVER
* Shukrayaan-1
* VAMP
* Venera-D
* VERITAS
* VICI
* VISAGE
* VISE
* VOX
* Zephyr

|

Flybys|

* Europa Clipper
* Hayabusa2
* Mercury-P
* Laplace-P
* NASA Uranus orbiter and probe

Cancelled / concepts|

* European Venus Explorer
* Inspiration Mars
* TMK-Mavr
* Venus Orbiting Imaging Radar
* Vesta

Program overviews|

* Venera
* 3MV
* Mariner
* Pioneer Venus
* Vega

Related|

* Colonization
* Observations and explorations
* List of artificial objects on Venus
* List of missions
* Manned Venus flyby
* Terraforming
* VeSpR

* Missions are ordered by launch date. † indicates failure en route or before any data returned.

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