G8CQX IO81xu 20W 10m spot (unusual time)

Another interesting 10m spot. I spotted G8CQX-IO81xu (20W) on 10m at an unusual time (local time 3:08 a.m.) This was more than 2 hours before sunrise. About 1.5 hours before dawn, and 50 minutes before nautical twilight. It was, however, about 5 minutes after the start of astronomical twilight (time when full darkness ends).

Wales, Wisconsin
----------------
Astromomical twilight begins (full darkness ends) 03:04 a.m.
Nautical twilight begins (First light) 03:59 a.m.
Civil twilight begins (Dawn) 04:44 a.m.
Sunrise 05:19 a.m.

10m reports of G8CQX-IO81xu (20W) on 2019-07-03 08:08Z

rpt frequency -call- gridsq -km- azi
--- --------- ------ ------ ---- ---
-27 28.126066 KB9AMG EN52tx 6182 298
-12 28.126119 IZ0FKE JN61fw 1553 130
-10 28.126089 CT2IWW IN51wf 1269 204
+09 28.126059 IU1DZZ JN45hk 1058 128
-20 28.126044 OZ7IT. JO65df 1016 063
+04 28.126053 HB9TMC JN46lj 1003 123
+00 28.126054 HB9TMC JN46lj 1003 123
-25 28.126054 OE9GHV JN47wk 0987 115
-19 28.126054 OE9HLH JN47um 0971 115
-09 28.126073 HB9PM. JN36sx 0879 124

Checking VOACAP, if G8CQX beamed longpath to here (EN52tx), the direction would be 118 deg. Most of the reported azimuths fall in the range of 115-130 so it might be longpath. Distance would be 33809 km or 21008 miles.

These are all 7 of the 10m spots I reported from 0500Z-1300Z. No other spots before or after the G8CQX spot for an hour and a half or more.


05:36 KN8DMK EM89oo -11 28.126061 2W 0598 km 311
05:50 KN8DMK EM89oo -10 28.126061 2W 0598 km 311
-
06:20 KE3PL. EM74xx -21 28.126084 5W 0965 km 339
06:20 N2NOM. FN22bg -24 28.126058 5W 1025 km 279
06:40 KE3PL. EM74xx -23 28.126084 5W 0965 km 339
-
08:08 G8CQX. IO81xu -27 28.126066 20W 6182 km 298
-
13:00 VE1VDM FN85ij -26 28.126123 2W 2010 km 271

There was some sporadic-E from 0536Z-0640Z, but not sure if the G8CQX spot at 0808Z was sporadic-E since I don't see any other spots NA-EU around this time. In the past month or so, the earliest time I see for NA-EU 10m spots is around 11Z-12Z, well after sunrise and from locations east of me and closer to europe.

???