Capella 21

LIVE
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Link to this page

https://orbinauts.com/satellites/101135

  • Earth-watching satellite
  • T-MICROSAT-4
  • NORAD 101135
  • 2026-237AA
  • Low Earth orbit

Current orbit

Where Capella 21 is on the world map, with the orbit it is flying
View on live map

Orbit began over Brazil

Orbit ends over the Pacific Ocean

In the Earth’s shadow since

Back in sunlight

Past trackNext orbits

In view from you

Nobody watches Capella 21 go over, but a receiver still asks whether it is above the horizon. Say where you are and this card answers.

Your position is rounded to about a kilometre and sent only to the Orbinauts API, to find the pass.

No brightness has been published for Capella 21, so it is not a naked-eye satellite and no city page carries pass times for it. Nothing here estimates one.

Seeing it

There is nothing to go outside for: it is too faint for the naked eye. What it is up there for reaches the ground as pictures and measurements, not as a light in the sky.

Timeline

  1. Launch

    Launched, on the day GCAT records. Source

Summary

Over the South China Sea LIVE

Where is Capella 21?

At 4:41:24 PM UTC Capella 21 was over the South China Sea (10.5° N, 112.1° E), 597 km up, moving at 7.56 km/s and in the Earth’s shadow.

What is Capella 21?

A satellite that watches the Earth in low Earth orbit, in space since Oct 20, 2026.

Can I see Capella 21?

No, not with the naked eye: no brightness has been published for Capella 21, and nothing here estimates one; what people use is its pictures and measurements of the Earth.

General

Operator
Capella Space Corp.
State
United States of America
Built by
Capella Space Corp.
What it is
Earth-watching satellite
Launched
Mass
180 kg
Operating
Yes
Orbit class
Low Earth orbit

From GCAT, Jonathan McDowell’s general catalogue, licensed CC BY 4.0: the operator, the state, the manufacturer, what it is for, the launch day, the mass, and whether it is operating. The orbit class is read from its current elements.

Latest orbital data

Position received
4:41 PM UTC
Station time (UTC)
4:41 PM UTC
Latitude / longitude
10.5° N, 112.1° E
Altitude
597 km
Speed
7.56 km/s (27,220 km/h)
Course
south-east
Light
In the Earth’s shadow until 4:56 PM UTC
Inclination
53°
Orbital period
96.5 minutes
Orbits per day
14.92
This orbit
588 to 597 km
In shadow
36 minutes of each orbit
In view from
Within 1,760 km of the point below it
Elements epoch
Nov 8, 2026, 7:54 AM, 8 hours old
Source
Position from Space-Track orbital elements of Nov 8, 2026, 7:54 AM, 8 hours old.

No operator publishes an ephemeris for Capella 21, so every position here comes from its orbital elements.

In orbit

Close approaches
No close approach to Capella 21 has been reported publicly in the past thirty days.

From Space-Track’s public conjunction messages; the latest report was issued Nov 8, 2026, 1:11 PM, 3 hours old. Only approaches serious enough to be reported publicly are listed: within three days and, for two bodies near the Earth, closer than a kilometre with a chance of a collision above 1 in 10,000, the level at which NASA moves the ISS.

See every close approach reported in orbit.

Launched with

Capella 21 shares its launch, 2026-237, with 30 other bodies the catalogue lists in orbit.

BodyWhat it is
PULSAR-001Communications satellite
PULSAR-002Communications satellite
PULSAR-003Earth-watching satellite
PULSAR-004Satellite
IMPULSE-4 MIRANavigation satellite
SIRIUS-ASatellite
FRG-100D4Navigation satellite
CAPELLA-21 (ACADIA)Satellite
HAWK-15ASatellite
HAWK-15BSatellite
HAWK-15CSatellite
ICEYE-X84Earth-watching satellite
ICEYE-X88Earth-watching satellite
ICEYE-X109Earth-watching satellite
ICEYE-X110Earth-watching satellite
OBJECT RNavigation satellite
GNOMES-11Navigation satellite
PELICAN-12 3013Earth-watching satellite
UMBRA-13Earth-watching satellite
UMBRA-14Earth-watching satellite
CAPELLA-22 (ACADIA)Navigation satellite
TOMORROW-S14Earth-watching satellite
TOMORROW-S15Earth-watching satellite
T-MICROSAT-3Navigation satellite
STARBURST-1Satellite
PTS-1Navigation satellite
W-SERIES 7Satellite
MAXWELLSatellite
FOSSASAT2E27Communications satellite
SIRIUS-BCommunications satellite

Read from the international designators of the US catalogue: the year and the launch number every piece of one launch shares. A body that has come down is no longer listed.

Beside the others

SatelliteTypical altitudeOrbital periodMassIn space since
Capella 21588 to 597 km97 minutes180 kg2026
WorldView-3612 to 615 km97 minutesabout 2.8 t2014
SAOCOM 1A622 to 624 km97 minutesabout 3 t2018
ALOS-2630 to 632 km97 minutesabout 2.1 t2014
PAZ507 to 510 km95 minutesabout 1.4 t2018
SMAP681 to 683 km98 minutes944 kg2015

Data and API

The current elements from Space-Track as an OMM object, epoch Nov 8, 2026, 7:54 AM, 8 hours old.

{
  "OBJECT_NAME": "T-MICROSAT-4",
  "OBJECT_ID": "2026-237AA",
  "EPOCH": "2026-11-08T07:54:21.487104",
  "MEAN_MOTION": 14.91837252,
  "ECCENTRICITY": 0.00069651,
  "INCLINATION": 52.9855,
  "RA_OF_ASC_NODE": 239.9245,
  "ARG_OF_PERICENTER": 345.1441,
  "MEAN_ANOMALY": 14.9335,
  "EPHEMERIS_TYPE": 0,
  "CLASSIFICATION_TYPE": "U",
  "NORAD_CAT_ID": 101135,
  "ELEMENT_SET_NO": 999,
  "REV_AT_EPOCH": 282,
  "BSTAR": 0.00020775303,
  "MEAN_MOTION_DOT": 0.00001872,
  "MEAN_MOTION_DDOT": 0
}