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Imaging the Planet Neptune
Neptune Ephemeris for the next 18 months
DateElongationTransitmVDiameterIlluminationIllum ArcsecTilt
2020-06-0180.152+7.9 mV2.27"100 %4-23.7 SP
2020-07-01108.752+7.9 mV2.31"100 %4-23.6 SP
2020-08-01138.652+7.8 mV2.34"100 %4-23.7 SP
2020-09-01169.151+7.8 mV2.36"100 %4-23.9 SP
2020-10-01160.751+7.8 mV2.36"100 %4-24.1 SP
2020-11-01129.451+7.8 mV2.33"100 %4-24.3 SP
2020-12-0198.951+7.9 mV2.29"100 %4-24.4 SP
2021-01-0167.751+7.9 mV2.25"100 %4-24.3 SP
2021-02-0136.951+8.0 mV2.22"100 %4-24.1 SP
2021-03-019.752+8.0 mV2.21"100 %4-23.8 SP
2021-04-0120.152+8.0 mV2.21"100 %4-23.5 SP
2021-05-0148.552+7.9 mV2.23"100 %4-23.2 SP
2021-06-0177.753+7.9 mV2.27"100 %4-23.0 SP
2021-07-01106.253+7.9 mV2.31"100 %4-23.0 SP
2021-08-01136.153+7.8 mV2.34"100 %4-23.0 SP
2021-09-01166.652+7.8 mV2.36"100 %4-23.2 SP
2021-10-01163.352+7.8 mV2.36"100 %4-23.5 SP
2021-11-01131.952+7.8 mV2.33"100 %4-23.7 SP
Next 5 Neptune Oppositions
All Neptune Oppositions 2000 - 2049 AD
DateTransitmVDiameterIllum ArcsecTilt
2019-09-1050 alt+7.8 mV2.36"4-23.7 SP
2020-09-1151 alt+7.8 mV2.36"4-23.7 SP
2021-09-1452 alt+7.8 mV2.36"4-23.7 SP
2022-09-1653 alt+7.8 mV2.36"4-23.7 SP
2023-09-1954 alt+7.8 mV2.36"4-23.7 SP
2024-09-2155 alt+7.8 mV2.36"4-23.7 SP
2025-09-2357 alt+7.8 mV2.36"4-23.7 SP
2026-09-2657 alt+7.8 mV2.36"4-23.7 SP
2027-09-2857 alt+7.8 mV2.37"4-23.7 SP
2028-09-3058 alt+7.8 mV2.37"4-23.7 SP
Upcoming Neptune Planetary Conjunctions
DateSeparationSolar ElongCloser PlanetSizeIllumFurther PlanetSizeIllum
2000-02-220.4928Venus11.6"89%Neptune2.2"100%
2002-02-240.4926Mercury6.7"64%Neptune2.2"100%
2003-03-120.1840Venus14.9"74%Neptune2.2"100%
2008-01-220.2719Mercury7.1"53%Neptune2.2"100%
2009-05-270.39100Jupiter41.1"99%Neptune2.3"100%
2011-03-270.1536Venus13.6"79%Neptune2.2"100%
2013-02-040.4116Mars4.1"99%Neptune2.2"100%
2013-02-070.4114Mercury5.6"85%Neptune2.2"100%
2015-01-200.2136Mars4.6"95%Neptune2.2"100%
2016-03-200.4920Venus10.6"94%Neptune2.2"100%
2017-01-010.0259Mars5.7"90%Neptune2.2"100%
2017-01-120.3647Venus24.5"51%Neptune2.2"100%
2018-02-250.437Mercury5.1"97%Neptune2.2"100%
2018-12-070.0388Mars8.8"86%Neptune2.3"100%
2019-04-020.3825Mercury9.1"32%Neptune2.2"100%
2019-04-100.2933Venus12.6"83%Neptune2.2"100%
2020-01-270.0740Venus15"75%Neptune2.2"100%
2021-03-140.373Venus9.7"100%Neptune2.2"100%
2022-04-120.1029Jupiter33.8"100%Neptune2.2"100%
2022-04-270.0143Venus17.1"66%Neptune2.2"100%
2023-02-150.0228Venus11.6"89%Neptune2.2"100%
2023-03-160.382Mercury5"100%Neptune2.2"100%
2024-03-080.449Mercury5.3"95%Neptune2.2"100%
2024-04-030.2616Venus10.2"96%Neptune2.2"100%
2024-04-290.0440Mars4.7"94%Neptune2.2"100%
2027-04-110.2117Mercury5.4"85%Neptune2.2"100%
2027-04-240.2429Venus11.7"87%Neptune2.2"100%
2029-03-270.352Mercury5"100%Neptune2.2"100%
2030-05-120.3040Venus15.1"73%Neptune2.2"100%
2033-05-250.2446Venus25"47%Neptune2.2"100%
2034-04-160.236Mercury5.1"97%Neptune2.2"100%
2035-05-080.0325Venus11.1"91%Neptune2.2"100%
2038-05-270.3037Venus13.7"78%Neptune2.2"100%
2039-05-050.3513Mercury5.3"89%Neptune2.2"100%
2039-06-230.3959Mars5.8"89%Neptune2.3"100%
2043-05-220.2921Venus10.6"93%Neptune2.2"100%
2044-05-230.4920Mercury6"73%Neptune2.2"100%
2046-06-110.1133Venus12.6"83%Neptune2.2"100%
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