List of Constellation missions

The Constellation Program was NASA's planned future human spaceflight program between 2005 and 2009, which aimed to develop a new crewed spacecraft and a pair of launchers to continue servicing the International Space Station and return to the Moon.
As of 2009, a single uncrewed suborbital launch test had been flown, with crewed missions anticipated to begin between 2014 and 2017-2019. On February 1, 2010, President Obama announced that he intended to cancel the program with the U.S. 2011 fiscal year budget. A revised proposal in April confirmed that the Orion spacecraft would be retained for future missions beyond low Earth orbit, with the Ares launchers redeveloped into the Space Launch System. However, the Constellation Program itself was cancelled, with low Earth orbit operations transferred to the Commercial Crew Development program, which itself would not begin crewed launches until Crew Dragon Demo-2 in 2020.

Development of mission plans

In October 2006 NASA released a draft schedule of all planned NASA Constellation missions through 2019. This document included descriptions of a series of proposed vehicle test missions. In July 2007 the schedule was reviewed. In January 2008 the schedule was again reviewed. The most recent published set of milestones is from February 2009. Also, an independent assessment by the Review of United States Human Space Flight Plans Committee in October 2009 found that under NASA's then-current plans and budget the Ares I would not be ready to launch until 2017–2019, with the Ares V not available until the late 2020s.
On October 11, 2010, the Constellation program was cancelled, ending development of the Altair, Ares I, and Ares V. The Orion Crew Exploration Vehicle was renamed the Orion Multi-Purpose Crew Vehicle, to be launched on the Space Launch System.

Constellation missions

After cancellation, one of the original launches took place anyway. Several more missions similar to Constellation missions would launch under the Orion test program and the following up Artemis program.

Order	Date	Mission	Launch Vehicle	Duration	Crew Size	Launch Pad	Note
1	October 28, 2009	Ares I-X	Ares I-X	~2 min.	Uncrewed	39B	Atmospheric test of the first stage of the Ares I-X launcher with four active SRM segments and an inert fifth segment and upper stage. Program had already been cancelled by time of launch.

Order	Year	Mission	Launch Vehicle	Duration	Crew Size	Launch Pad	Notes
2	2012	Ares I-X Prime "Ares 1Y"	Ares I-X Prime "Ares 1Y"	~8 min.	Uncrewed	39B	Second sub-orbital Ares I-X test flight, consisting of a five segment booster with real upper stage and a dummy J-2 engine. High altitude abort.
3	2014	Orion 1	Ares I		Uncrewed	39B	First flight of the Orion spacecraft, in an unmanned orbital flight with a splashdown off Australia. NOTE: This test was replaced under the Orion test program as Exploration Flight Test-1 in 2014, using a different mission profile.
4	2015	Orion 2	Ares I		Crewed	39B	First crewed Orion test flight. Includes demonstration of rendezvous and proximity operations with the ISS. First docking with the ISS. Landing at Edwards AFB. Leaves an adapter on the ISS.
5	2015	Orion 3	Ares I		Crewed	39B	Second crewed Orion test flight. Leaves a second adapter on the ISS.
6	2015	Orion 4	Ares I		Crewed	39B	ISS Crew Rotation Flight. First operational Orion flight.
7	2016	Orion 5	Ares I		Crewed	39B	ISS Crew Rotation Flight
8	2016	Orion 6	Ares I		Crewed	39B	ISS Crew Rotation Flight
9	2017	Orion 7	Ares I		Crewed	39B	ISS Crew Rotation Flight
10	2017	Orion 8	Ares I		Crewed	39B	ISS Crew Rotation Flight
11	2018	Orion 9	Ares I		Crewed	39B	ISS Crew Rotation Flight
13	2018	Ares V-Y	Ares V-Y		Uncrewed	39A	Maiden flight of Ares V NOTE: This test was replaced under the SLS project and Artemis program as Artemis 1 in 2022, using a different mission profile.
14	2018	Orion 10	Ares I		Crewed	39B	ISS Crew Rotation Flight
15	2019	Altair 1	Ares V		Uncrewed	39A	Maiden flight of Altair. Altair for Orion 11.
16	2019	Orion 11	Ares I		Crewed	39B
17	2019	Orion 12	Ares I		Crewed	39B	ISS Crew Rotation Flight
18	2019	Altair 2	Ares V		Uncrewed	39A	Altair for Orion 13
19	2019	Orion 13	Ares I		Crewed	39B	First Orion flight to the Moon
20	2019	Orion 14	Ares I		Crewed	39B	ISS Crew Rotation Flight
21	2020	Altair 3	Ares V		Uncrewed	39A	Altair for Orion 15
22	2020	Orion 15	Ares I		Crewed	39B	Flight to the Moon
23	2020	Orion 16	Ares I		Crewed	39B	ISS Crew Rotation Flight
24	2020	Altair 4	Ares V		Uncrewed	39A	Direct lunar flight?
25	2020	Orion 17	Ares I		Crewed	39B	ISS Crew Rotation Flight

Abort tests

These were planned to test the launch escape system of the Orion spacecraft on the launchpad.

Order	Date	Mission	Note
1	May 6, 2010	Pad Abort-1	Used the former shape of the LAS adapter. Also known as abort flight test. The full-scale Orion AFT crew module underwent preparations at Dryden Flight Research Center. Orion Crew Module Pathfinder 'Test Article' fabricated at Langley Research Center. The PA-1 Test took place at U.S. Army's White Sands Missile Range in New Mexico. While originally planned to occur in late 2008, the test slipped to "early 2010". In October 2009 Orbital Sciences indicated the test was scheduled for March 2010.

Successor missions

Several missions with modified profiles similar to the planned missions were launched after the conclusion of the Constellation program.

Order	Date	Mission	Launch Vehicle	Duration	Crew Size	Launch Pad	Note
	December 5, 2014, 12:05 UTC	Exploration Flight Test 1 Formerly "Orion-1"	Delta IV Heavy	4 hours, 24 minutes	Uncrewed	SLC-37B	First flight of the Orion spacecraft, in an uncrewed orbital flight with a splashdown off California. Unlike the original mission 3 the Delta-IV replaced the Ares-I and a high apogee orbit return was used instead of low Earth orbit.
	November 16, 2022, 06:47:44 UTC	Artemis 1 Formerly, "Exploration Mission 1", "Ares V flight 1"	Space Launch System	25.5 days	Uncrewed	LC-39B	Maiden flight of SLS, the update follow-on to Ares V. The Ares-V development SLS is used in place of the earlier iteration Ares-V, an Orion capsule is included instead of a mass simulator for this test flight, which sends Orion on a test mission around the Moon, that was not part of the mission list for Constellation; which had Orion-13 as the first Moon mission, that was crewed, including lunar landing, on Constellation mission 19.