Mars mission duration

Conjunction and opposition mission trajectory.

Comparison conjunction and opposite mission type:

Mission type ^[1]	Total mission duration, days	Earth-Mars trip, days	Time spent at destination	Mars-Earth trip, days	Total ∆V, km/s	Trans-Mars Injection, km/s	Mars Orbital Insertion, km/s	Trans-Earth Injection, km/s
Conjuction	10005	198	558	197	2.81	0.50	1.25	1.06
Opposition	560	177	40	342	5.69	0.61	1.75	3.33

Conjunction and opposition Mars mission duration comparison.

Examples of the near future missions opportunities

Mars short-stay (opposition) mission:

Departure Date ^[2]	Mission Duration (years)	Time spent at destination	Injection (C3/∆v), km/s	Post-escape ∆v, km/s	Destination Aerocapture (∆V/Inertial), km/s	Earth Aerocapture (∆V/Inertial), km/s
19-Jul-2020	1.50	1 month	14.5/3.87	2.80	1.41/6.2	0.86/11.8
22-Oct-2021	1.39	1 month	14.4/3.86	2.80	3.48/8.2	0.47/11.4
14-Sep-2023	1.64	1 month	25.7/4.34	0.99	3.29/8.0	0.48/11.4

Mars long-stay (conjunction) mission:

Departure Date ^[2]	Mission Duration (years)	Time spent at destination	Injection (C3/∆v), km/s	Post-escape ∆v, km/s	Destination Aerocapture (∆V/Inertial), km/s	Earth Aerocapture (∆V/Inertial), km/s
4-Aug-2020	2.53	1.40 years	15.7/3.92	1.45	0.70/5.5	0.80/11.7
15-Sep-2022	2.63	0.85 years	14.4/3.86	0.94	0.88/5.6	0.50/11.4
14-Oct-2024	2.62	0.87 years	12.1/3.76	0.82	0.73/5.5	0.58/11.5

References

↑ Bryan Mattfeld, Chel Stromgren - Trades Between Opposition and Conjunction Class Trajectories for Early Human Mission to Mars in AIAA Space 2014; 4-7 Aug. 2014; San Diego, California
↑ ^2.0 ^2.1 Cyrus Foster, Matthew Daniels - Mission Opportunities for Human Exploration of Nearby Planetary Bodies in AIAA SPACE 2010 Conference & Exposition, 30 August - 2 September 2010, Anaheim, California ISBN AIAA 2010-8609