Satellite Distance Records

AO-40 (U/S) – 18,730 km. ZL1AOX in RF72mv <> DJ5MN/MM in JM47ts. 24-Aug-2003 at 22:54 UTC. (Source ZL1AOX)

AO-40 (L/S) – 18,298 km. ZL1AOX in RF72mv <> I8CVS in JN63rh. 29-Sep-2003 at 21:24 UTC. (Source: ZL1AOX)

AO-13(B) – 17,097 km. KA7LDN (now AD7D) in CN87wn <> FR5DN in LG78qs. 25-Aug-1993 at 07:01 UTC. (Source: AD7D)

AO-10(B) – 15,242 km. W0RPK in EN31fk <> VK8OB in PG66wh. 18-Apr-1984 at 12:42 UTC. (Source: W0RPK)

AO-7 (B) – 8,030.895 km. KG5CCI in EM34st20sc <> PY2RN in GG66lw77jq. 10-Feb-2016 at 20:09 UTC. (Source: KG5CCI)

AO-6 – 7,764 km. W3TMZ in FM19ji <> KH6HLK in BL01wh. 7-Jul-1973. (Source: W3TMZ and W0RPK)

FO-20 (JA) – 7,759 km. VE7VVW in DO00ig <> LX2LA in JN39cp. 29-Oct-1995 at 16:33 UTC. (Source: VA7VW/VE7VVW)

FO-29 (JA) – 7,608.115 km. KG5CCI in EM35if85uf <> F4DXV in JN05ha20cc. 26-Feb-2017 at 13:16 UTC. (Source: KG5CCI / F4DXV)

AO-7 (A) – 6,763 km. W0RPK in EN31fk <> G6RH in JO01bk. 18-Nov-1980. (Source: W0RPK)

HO-68 (FM) – 6,742 km. KB1RVT in FN34jk <> SP8CGF in KO10or. 11-Jul-2010 at 12:30 UTC. (Source: KB1RVT)

RS-8 – 6,469 km. K8BL in EN91hq <> DH5EAI in JO30kk. 24-Feb-1984 at 17:33 UTC. (Source: K8BL)

AO-8 (J) – 6,331 km. W0RPK in EN31fk <> AH6BP in BL11ap. 14-August-1982. (Source: W0RPK)

RS-10 – 6,266 km. K8BL in EN91hq <> F9HR in JN18co. 15-Oct-1994 at 17:54 UTC. (Source: K8BL).

RS-1 – 6,223 km. W0RPK in EN31fk <> KH6IBA in BK29mm. 22-Dec-1978. (Source: W0RPK)

AO-85 – 5,751 km. FG8OJ in FK96ig <> EB1FVQ in IN52pe. 14-Apr-2016 at 19:15 UTC. (Source: FG8OJ)

RS-12 (K) – 5,564 km. K8BL in EN91hq <> GM3GNM in IO86en. 19-Oct-1994. (Source: K8BL)

AO-51 (V/U FM) – 5,558 km. KB1RVT in FN34jk <> PA1TNO in JO22li. 31-Mar-2011 at 18:10 UTC. (Source: KB1RVT)

SO-50 – 5,410 km. MI6GTY in IO64xm <> UB9UTJ in NO25mb. 24-Jan-2017 at 09:09 UTC. (Source: MI6GTY)

AO-40 (U/K) – 5,204 km. N1JEZ in FN34jm <> G3WDG in IO92rg. 7-May-2002. (Source: N1JEZ)

AO-27 – 5,119 km. WD9EWK in DM33xl <> VO1ONE in GN37om. 15-Feb-2006 at 22:00 UTC.

AO-73 – 4,955 km. NJ7H in EM24vp <> PV8DX in FJ92pt. 25-Sep-2016 at 01:59 UTC. (Source: NJ7H)

XW-2E – 4,717 km. PV8DX in FJ92pt <> K4FEG in EM55aj. 27-Sep-2015 at 22:44 UTC. (Source: PV8DX)

HO-68 (V/U Linear) – 4,685 km. NH6VB in BL01xu <> WD9EWK in DM43ap. 10-Apr-2010 at 18:50 UTC. (Source: WD9EWK)

EO-79 – 4,645 km.  FG8OJ in FK96ig <> PY2RN in GG66lw. 28-Mar-2016 at 15:07 UTC. (Source PY2RN)

XW-2F – 4,645 km. FG8OJ in FK96ig <> PY2RN in GG66lw. 04-Mar-2016 at 21:34 UTC. (Source: PY2RN)

XW-2C – 4,645 km. FG8OJ in FK96ig <> PY2RN in GG66lw. 04-Mar-2016 at 21:39 UTC. (Source: PY2RN)

XW-2A – 4,645 km. FG8OJ in FK96ig <> PY2RN in GG66lw. 04-Mar-2016 at 22:19 UTC. (Source: PY2RN)

UKube-1 – 4,357 km.. AL7RS in AP65tg  <> W7QL  in DN40bo. 13-Sep-2016 at 21:12 UTC. (Source: AL7RS)

AO-16 (V FM / U DSB) – 3,673 km. CJ7EWK in CN89lg <> XE1KW in DK89df. 08-Nov-2008 at 22:39 UTC. (Source: WD9EWK)

AO-51 (V/S FM) – 3,550 km. WD9EWK in DM33xp <> VE2DWE in FN36ka. 24-May-2007 at 15:07 UTC. (Source: WD9EWK)

NO-84 (Digipeater) – 3,345 km. WD9EWK in DM43ap <> KE3LB in FN21ll. 24-Dec-2016 at 21:21 UTC. (Source: WD9EWK)

ISS Digipeater – 2,927 km. WD9EWK in DM34so <> XE3ISS in EL61oc. 11-Jun-2016 at 21:02 UTC. (Source: WD9EWK)

RS-8 – 2,795 km. W0RPK in EN31fk <> XE1FAO in EK09ji. 22-May-1982 at 03:25 UTC. (Source: W0RPK)

AO-21 – 2,702 km. K8BL in EN91hq <> VE6LU in DO33hl. 10-Mar-1994 at 19:30 UTC. (Source: K8BL)

NO-44 – 2,449 km. WD9EWK in DM43bn <> KC9ELU in EM79hj. 01-Jan-2015 at 17:31 UTC. (Source: WD9EWK)

SO-35 (U/V FM) – 2,097 km. WD9EWK in DM33vm <> XE1MEX in EK08mu. 08-Mar-2000 at 04:09 UTC. (Source: WD9EWK)

RS-15 – 1,998 km. K8BL in EN91hq <> KF2T in DM79mn. 27-Jan-1995 at 14:10 UTC. (Source: K8BL)

Please email n8hm@amsat.org if you wish to claim a new record, longer distance QSO not yet documented, or records for any other satellite/transponder not yet listed. Please note that if a satellite carries multiple transponders or supports multiple frequency bands, records on each transponder/band may be claimed, such as Mode A and B on AO-7 or Mode U/S, L/S, U/K, etc, on AO-40. This includes the ISS and records may be claimed for the packet digipeater and crossband repeater, but does not include different operating modes on the same transponder (such as CW or SSB on AO-7 Mode B).

Maximum Theoretical Ranges (Sea Level to Sea Level) at Apogee
Calculations from http://www.csgnetwork.com/satorbdatacalc.html

Currently Operational Communications Satellites
AO-7 (1459 km x 1440 km) – 7,810 km
FO-29 (1322 km x 800 km) – 7,502 km
AO-85 (808 km x 501 km) – 6,028 km
SO-50 (703 km x 587 km) – 5,676 km
NO-84 (679 km x 360 km) – 5,566 km
AO-73 (669 km x 586 km) – 5,544 km
LilacSat-2 (543 km x 518 km) – 5,038 km
XW-2F (541 km x 516 km) – 5,016 km
XW-2A (475 km x 452 km) – 4,730 km
ISS (406 km x 397 km) – 4,378 km

Selected Non-Operational Satellites
AO-40 (58820 km x 1000 km) – 18,568 km
AO-13 (38000 km x 720 km) – 17,974 km
AO-10 (35524 km x 3923 km) – 17,864 km
FO-20 (1743 km x 912 km) – 8,426 km