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MERCURY ONE (M1)

In orbit NORAD 66742 YXPN-6198-5145-0440-6603

Observations 0
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2025

Falcon 9 Block 5 | Transporter 15 (Dedicated SSO Rideshare)

Falcon 9 Block 5

Carrier rocket

Space Launch Complex 4E

Spaceport

0

Observations all time

Mission information
Spacecraft name
MERCURY ONE (M1)
Status
Active
The satellite is in orbit
The network has not received data from this satellite for a long time
Launch and timeline
Launch
Falcon 9 Block 5 | Transporter 15 (Dedicated SSO Rideshare)
Carrier rocket
Falcon 9 Block 5
Spaceport
Space Launch Complex 4E
Launch time
2025-11-28 18:44:30
Separation time
2025-11-28 20:05:36
Satellite appearance
Data for the last 30 days
Orbital parameters of the satellite
Perigee
500.98 km
Apogee
502.12 km
Inclination
97.4°
Period
94.7 min
Semi-major axis
6879.7 km
Velocity
7.61 km/s
Orbital elements
TLE source
Celestrak
TLE updated
2026-10-10 12:56:50 UTC
Two-line elements (TLE)
1 66742U 25276CE  26283.20264064  .00003759  00000-0  17558-3 0  9995
2 66742  97.4093 354.7807 0000828 319.8734  40.2440 15.20416386 47894
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Orbit history, past year

Mean elements of every TLE set over the past 365 days, plotted against the epoch of the set. Each source is its own line; click it in the legend to hide it. A jump in altitude is a manoeuvre or a bad set; lines drifting apart are a disagreement between sources. “TLE age” is how many hours have passed since the epoch of the source's freshest set, plotted against when the set reached us, on a logarithmic scale. A set the source repeats unchanged does not reset the age.

Prediction divergence

Each TLE set is propagated with SGP4 to the epoch of the next set from the same source and compared with it, plotted against the epoch of the next set; the tooltip shows how many hours ahead the prediction ran. The logarithmic scale shows the size of the divergence and the tooltip its sign: plus along-track means the prediction is ahead of the satellite. This is how well the sets agree, not the true error: the reference is a TLE too, off by about a kilometre. An outlier is a manoeuvre between sets. Sets more than a week apart are not compared.

Time of closest approach, UTC Object 1 Object 2 Distance, km Speed, km/s Max. probability
2026-10-12 01:21:31 MERCURY ONE (M1)
NORAD 66742 		SL-16 DEB
NORAD 29094 		0.281 14.85 2.2e-05
2026-10-12 03:59:03 MERCURY ONE (M1)
NORAD 66742 		MISR-C-2
NORAD 68633 		4.882 11.10 1.3e-07
2026-10-12 07:47:36 OBJECT C
NORAD 65940 		MERCURY ONE (M1)
NORAD 66742 		1.354 1.22 2.4e-06
2026-10-13 03:17:00 MERCURY ONE (M1)
NORAD 66742 		CHUBUSAT-3
NORAD 41339 		4.180 10.80 1.9e-07
2026-10-13 04:23:09 MERCURY ONE (M1)
NORAD 66742 		DB-WALI-WMU
NORAD 68443 		2.321 12.72 5.1e-07
2026-10-13 07:45:14 STARLINK-1451
NORAD 45668 		MERCURY ONE (M1)
NORAD 66742 		2.153 14.50 1.3e-05
2026-10-14 05:08:38 MERCURY ONE (M1)
NORAD 66742 		QUBE-II
NORAD 69023 		3.852 15.08 1.1e-07
2026-10-14 06:43:21 MERCURY ONE (M1)
NORAD 66742 		QUBE-II
NORAD 69023 		2.522 15.08 2.5e-07
2026-10-14 18:13:18 BLACKJACK ACES-1
NORAD 56956 		MERCURY ONE (M1)
NORAD 66742 		4.734 8.07 1.7e-07
2026-10-15 20:55:45 MERCURY ONE (M1)
NORAD 66742 		FALCON 9 DEB
NORAD 48610 		4.298 12.92 1.4e-07

Data: CelesTrak SOCRATES Plus, computed from TLEs of the public catalog. This is an estimate, not grounds for a manoeuvre: TLEs carry no covariance, and the maximum probability assumes a position error.

All conjunctions of this satellite