January 1973
8 Jan
Luna 21
Proton11 Jan
Kosmos 543
Voskhod20 Jan
Kosmos 544
Kosmos24 Jan
Kosmos 545
Kosmos26 Jan
Kosmos 546
Kosmos28 Jan
TVC test
Lambda
February 1973
1 Feb
Kosmos 547
Voskhod3 Feb
Molniya 1-23
Molniya8 Feb
Kosmos 548
Voskhod15 Feb
Prognoz-3
Molniya28 Feb
Kosmos 549
Kosmos
March 1973
1 Mar
Kosmos 550
Voskhod6 Mar
Kosmos 551
Voskhod6 Mar
AFP-720
Atlas9 Mar
OPS-8410
Titan20 Mar
Meteor 1-14
Vostok22 Mar
Kosmos 552
Voskhod
April 1973
3 Apr
Salyut 2
Proton5 Apr
Molniya 2-5
Molniya6 Apr
Pioneer 11
Atlas12 Apr
Kosmos 553
Kosmos19 Apr
Interkosmos 9
Kosmos19 Apr
Kosmos 554
Voskhod20 Apr
Anik-A2
Delta25 Apr
US-A
Tsyklon25 Apr
Kosmos 555
Voskhod
May 1973
5 May
Kosmos 556
Voskhod11 May
Kosmos 557
Proton14 May
Skylab 1
Saturn V16 May
OPS-2093
Titan17 May
Kosmos 558
Kosmos18 May
Kosmos 559
Soyuz21 May
Castor / Pollux
Diamant23 May
Kosmos 560
Voskhod25 May
Kosmos 562
Kosmos25 May
Skylab 2
Saturn I25 May
Kosmos 561
Voskhod29 May
Meteor 1-15
Vostok
June 1973
6 Jun
Kosmos 563
Voskhod8 Jun
Kosmos 564-571
Kosmos10 Jun
Kosmos 572
Voskhod10 Jun
Explorer 49
Delta12 Jun
OPS-6157
Titan15 Jun
Kosmos 573
Soyuz20 Jun
Kosmos 574
Kosmos21 Jun
Kosmos 575
Voskhod26 Jun
Kosmos 576
Kosmos26 Jun
OPS-4018
Titan27 Jun
Kosmos 576
Soyuz
July 1973
4 Jul
Zenit-4M
Voskhod11 Jul
Molniya 2-6
Molniya13 Jul
OPS-8261
Titan16 Jul
ITOS-E
Delta21 Jul
Mars 4
Proton25 Jul
Kosmos 577
Voskhod25 Jul
Mars 5
Proton28 Jul
Skylab 3
Saturn I
August 1973
1 Aug
Kosmos 578
Voskhod5 Aug
Mars 6
Proton9 Aug
Mars 7
Proton17 Aug
DMSP-5B-F4
Thor21 Aug
Kosmos 579
Voskhod21 Aug
OPS-7724
Titan22 Aug
Kosmos 580
Kosmos23 Aug
Intelsat 4 F7
Atlas24 Aug
Kosmos 581
Voskhod28 Aug
Kosmos 582
Kosmos29 Aug
REV test
Atlas30 Aug
Molniya 1-24
Molniya30 Aug
Kosmos 583
Voskhod
September 1973
6 Sep
Kosmos 584
Voskhod8 Sep
Kosmos 585
Kosmos14 Sep
Kosmos 586
Kosmos21 Sep
Kosmos 587
Soyuz27 Sep
Soyuz 12
Soyuz27 Sep
OPS-6275
Titan30 Sep
REV test
Atlas
October 1973
2 Oct
Kosmos 588-595
Kosmos3 Oct
Kosmos 596
Voskhod6 Oct
SSTTP M2-27
Titan6 Oct
Kosmos 597
Voskhod10 Oct
Kosmos 598
Voskhod15 Oct
Kosmos 599
Voskhod16 Oct
Kosmos 601
Kosmos16 Oct
Kosmos 600
Voskhod19 Oct
Molniya 2-7
Molniya20 Oct
Kosmos 602
Voskhod26 Oct
Explorer 50
Delta27 Oct
Kosmos 603
Voskhod29 Oct
Kosmos 604
Vostok30 Oct
Interkosmos 10
Kosmos30 Oct
Transit-O 20
Scout31 Oct
Kosmos 605
Soyuz
November 1973
2 Nov
Kosmos 606
Molniya3 Nov
Mariner 10
Atlas6 Nov
NOAA-3
Delta10 Nov
Kosmos 607
Voskhod10 Nov
OPS-6630
Titan14 Nov
Molniya 1-25
Molniya16 Nov
Skylab 4
Saturn I20 Nov
Kosmos 608
Kosmos21 Nov
Kosmos 609
Voskhod27 Nov
Kosmos 610
Kosmos28 Nov
Kosmos 611
Kosmos28 Nov
Kosmos 612
Voskhod30 Nov
Kosmos 613
Soyuz30 Nov
Molniya 1-26
Molniya
December 1973
4 Dec
Kosmos 614
Kosmos13 Dec
Kosmos 615
Kosmos13 Dec
OPS-9433
Titan16 Dec
Explorer 51
Delta17 Dec
Kosmos 616
Soyuz18 Dec
Soyuz 13
Soyuz19 Dec
Kosmos 617-624
Kosmos21 Dec
Kosmos 625
Voskhod25 Dec
Molniya 2-8
Molniya26 Dec
Oreol 2
Kosmos27 Dec
Kosmos 626
Tsyklon29 Dec
Kosmos 627
Kosmos