Showing default

OV1-13, 3173

Orbit data source: Space-Track

OV1-13, 3173 is a payload satellite owned by USAF OAR (US) that was launched on Sat, 06 Apr 1968 UTC via an ATLAS F launch vehicle from the Air Force Western Test Range (AFWTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/3173?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/3173?theme=dark&initialShowStats=false

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

Identifier

3173, 1968-026A

Orbit

Active

Country

Related business

US Air Force Office of Aerospace Research (US)

Manufacturer

GD/Convair

Mission

Spacecraft

Bus & Motor

OV1, Unknown motor

Mass

107 kg wet, 107 kg dry

Launch date (UTC)

1968-04-06 (58 years ago)

Launch vehicle

ATLAS F

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 8 hours ago

TLE from 8 hours ago

0 OV1-13
1  3173U 68026A   26127.63996712  .00000066  00000-0  10945-3 0  9991
2  3173  99.9474  21.3536 3853196 324.9068  14.9339  7.25846886535269

Epoch: 2026-05-07T15:21Z

TLE epoch observation values (Epoch: 2026-05-07T15:21:33.159Z)

Latitude

-0.00014°

Longitude

-74.51775°

Altitude

921.548 km

Speed

8.595 km/s

True Right ascension

01h 25m 24s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

07:09:19

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

9,228.217 km

Perigee altitude

546.561 km

Semi-major axis

11,265.526 km

Eccentricity

0.38532

Inclination

99.9474°

RAAN

21.3536°

Arg. of periapsis

324.9068°

True anomaly

35.20541°

Mean anomaly

14.9339°

Eccentric anomaly

23.86647°

Mean motion

1.81516 °/min

Orbital period

198.33 mins

BSTAR

0.00010945

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

Other satellites on launch #26 in the year 1968 (1968-04-06 UTC)

OV1-14 R/B, 3177

OV1-14, 3174

OV1-13 R/B, 3212

Did you know?

You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

Click here to try in Sandbox

OV1-13 Visibility forecast

Loading observer location...
Set Observer location

Span	Click to sort rows by Start time (UTC) header in descending order	Start Az.	Max El. time (UTC)	Max El. Az.	Max El.	End time (UTC)	End Az.
87 mins	2026-05-08 02:03:35.245Z	19.88° NNE	2026-05-08 02:49:35.245Z	86.14° E	29.152°	2026-05-08 03:30:35.245Z	144.997° SSE
94 mins	2026-05-08 05:15:35.245Z	13.696° NNE	2026-05-08 05:59:35.245Z	316.868° NNW	44.992°	2026-05-08 06:49:35.245Z	210.004° SW
73 mins	2026-05-08 08:28:35.245Z	13.32° NNE	2026-05-08 08:57:35.245Z	320.804° NNW	33.261°	2026-05-08 09:41:35.245Z	268.258° W
37 mins	2026-05-08 11:37:35.245Z	28.109° NE	2026-05-08 11:51:35.245Z	354.146° N	19.828°	2026-05-08 12:14:35.245Z	321.97° NNW
31 mins	2026-05-08 14:40:35.245Z	91.121° ESE	2026-05-08 14:48:35.245Z	40.035° NE	30.66°	2026-05-08 15:11:35.245Z	345.697° N
27 mins	2026-05-08 17:54:35.245Z	212.094° SW	2026-05-08 18:00:35.245Z	271.154° WNW	35.318°	2026-05-08 18:21:35.245Z	344.116° N

Items per page:

1–6 of 6 items

of 1 page

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

Please sign-in to view Co-orbital & Co-planar RSOs.

Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

Authenticating...

Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in descending order

Check out OV1-13, 3173 on other resources

View OV1-13, 3173 on NASA - NSSDCA Website

View OV1-13, 3173 on Heavens-Above

View OV1-13, 3173 on Keep Track

View OV1-13, 3173 on Celestrak

View OV1-13, 3173 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

OV1-13, 3173

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-05-07T15:21:33.159Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #26 in the year 1968 (1968-04-06 UTC)

OV1-13 Visibility forecast

Co-orbital & Co-planar RSOs

Check out OV1-13, 3173 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago