Transporter-13 Rideshare : VSFB SLC-4E : 15 March 2025 (06:39 UTC)

TLE update for HERMES H5, HERMES H4 and HERMES H3:

HERMES H5
1 98611U 25000XX  25124.31826878  .00000000  00000-0  29611-3 0    04
2 98611  97.4508  20.2711 0005560 205.8432 195.2579 15.17361214    02
HERMES H4
1 98612U 25000XX  25121.97943176  .00000000  00000-0  29625-3 0    00
2 98612  97.4404  14.9334 0002726 313.1573 173.7635 15.17708001    02
HERMES H3
1 98613U 25000XX  25123.03313285  .00000000  00000-0  29990-3 0    07
2 98613  97.4390  21.1694 0007796 198.3722  27.3833 15.18999094    06

Note: TLE sets are not very accurate but definitely better than the current ones that are almost 3 weeks old.

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Some fixes on the previous TLE sets, still need some more observations to generate something more accurate:

HERMES H3
1 98613U 25000XX  25124.64752415  .00000000  00000-0  29990-3 0    07
2 98613  97.4390 190.1307 0007796 198.3722 302.1295 15.18999094    00
HERMES H4
1 98612U 25000XX  25124.88066493  .00000000  00000-0  29625-3 0    01
2 98612  97.4404   6.2914 0002726 313.1573 165.0687 15.17708001    01
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Three new objects tracked by NORAD:

OBJECT BP               
1 63833U 25052BP  25126.64002930  .00007896  00000+0  40750-3 0  9995
2 63833  97.4372  20.9787 0003940 166.7711 193.3627 15.16586564  8089
OBJECT BQ               
1 63834U 25052BQ  25126.61827291  .00006635  00000+0  33118-3 0  9998
2 63834  97.4467  21.0423 0007535 122.3754 237.8210 15.17808126  8087
OBJECT BR               
1 63835U 25052BR  25125.94976796  .00015891  00000+0  77115-3 0  9998
2 63835  97.4365  20.3705 0009590 120.1267 240.0919 15.18527369  7986

I’m asking you for confirmation, but apparently BQ seems to track HERMES H5, and BP could be compatible with HERMES H4. Not sure about BR and H3 though.

Cheers
R

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I confirm what you describe:

BQ seems to be the one that follow HERMES H5
BP while it is close to HERMES H4 doesn’t seem to be a very good fit
BR given that is the remaining one, should be H3

However we still expect other objects from this launch, so the new objects may not all of them describe HERMES satellites.

For now I’m going to change in DB the satellites to follow these objects and schedule a couple more observation to confirm or not the above.

For HERMES H3, I think that I mixed up the signals from HERMES H5, so the TLE I’ve published in my previous posts probably is following HERMES H5. @rcampana please point me to any Network’s observations, even if they are old, that you have managed to decode HERMES H3 signal, this will be very useful for further analysis and make sure that we track the right objects.

Hi Fredy,
this is a list of the most recent SATNOGS observation in which H3 packets were decoded:

11502333
11502334
11502643
11502662
11508671
11521134
11546827

And for H5:

11535641
11535797
11535844
11535852
11535880
11546902
11547217
11547222
11547300
11547348
11547363
11547370
11547371
11547457
11547520
11547538
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Perfect! The BR object seems to fit very well the observations for HERMES H3.

So, now let’s wait to see what is going on with the HERMES H4, maybe with an update of the TLE set of this object, and wait for objects to be assigned for H3 and H5 in order to move forward with identification.

One last request, can you confirm that signal on HERMES H6 observations is indeed HERMES H6? We are following some days now 63489 for it and looks like perfect fit, so with your confirmation we can move on identifying it.

Hi Fredy,
yes H6 is ok, you can see that in these obs for example (all beacons come from H6)

https://network.satnogs.org/observations/11535005/

y

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It looks like that H5 and H3 are now well tracked by the objects BR and BQ, however the H4 doesn’t seem to fit well object BP, for example here: SatNOGS Network - Observation 11553658

@rcampana I would like just to confirm that what we see in the observation above and other H4 observations is indeed H4.

I suggest we keep tracking this object for a couple more days and if it continues to not fit then go back to generate ours again.


In other news, from nasaspaceflight forum, there is a link to alba orbital youtube channel where they have posted a video of the deployment of HADES-ICM, HYDRA-W, UNIQORN-2Q.

Given that only these three satellite are visible in video, that means that the other 3 UNIQORNS weren’t deployed at the same time. With a quick search, I can not find any reference for their deployment, if it happens earlier, if it was successful or not or if it hasn’t happened yet. It’s important to know for identifying the remaining satellites of this launch.

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Hi Fredy,
in this observation (11553658) we decode about 25 beacons from H6 and only two from H4. Objects BK and BP appears to be very close together, so I think we have to wait that their orbital separation is large enough to isolate the beacons in order to unambiguously identify if BP is indeed H4.

Cheers
R

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Thanks! That was very useful! So, as you suggested, let’s keep scheduling and see in a couple of days after some separation!

For H5 and H3 I’ll do the identification process in the next week to have identified in DB and Network.

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Hi everyone,

Thanks a lot for all the support the community is giving us during these first weeks of HERMES operations. We are extremely grateful for your invaluable contribution to this project (the team already agreed to acknowledge that in our future publications), and we hope you can continue to use some of your time to observe the HERMES constellation.

In these days your observations are really valuable since we are troubling with a temporary inefficiency of our ground station. For this reason, the community obs represent more than 90% of our engineering data right now (all the efforts we are putting in resolving these issues are essentially based on the community), so we were wondering if you are planning to continue observing HERMES in the next period.

HERMES Team

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63254 YAM-8 2248.300 MHz

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@abrando I’ve seen that HERMES H1 has been identified in space-track.org as 63242. Does this mean you have managed to receive it/communicate with it?

Can you also give us a brief status of all the HERMES satellites, I’m going to update the status for this launch during the weekend and I’m looking to verify some of the space-track.org identifications.

Thank you!


In other news I’ve changed some days ago the object we follow for HYVRID to 98630 as it seems to be a better candidate.

Hello @fredy, we’ve never been able to receive anything from H1, nevertheless we agree on the association made with object 63242. Whereas to give the status of the other satellites, we are still able to receive from all of them, even if we are still struggling on the uplink point of view.

We identified all of them with the following objects:

  • H1: 63242
  • H2: 63243
  • H3: 63835
  • H4: 63833
  • H5: 63834
  • H6: 63242
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Anybody looking for Soap ? Found some 63263 on 2220 MHz :joy:

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63258 ICEYE-X46

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