odeh – BruneiAstronomy https://bruneiastronomy.org/web Advancing Astronomy & Falak Syarie in Brunei Darussalam Thu, 09 Jul 2020 00:48:10 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 https://bruneiastronomy.org/web/wp-content/uploads/2007/12/cropped-PABD-Logo-100x100-32x32.jpg odeh – BruneiAstronomy https://bruneiastronomy.org/web 32 32 Here is the challenge – What’s the youngest moon you can see this year 2020? https://bruneiastronomy.org/web/2020/01/here-is-the-challenge-whats-the-youngest-moon-you-can-see-this-year-2020/ https://bruneiastronomy.org/web/2020/01/here-is-the-challenge-whats-the-youngest-moon-you-can-see-this-year-2020/#respond Sun, 12 Jan 2020 08:00:00 +0000 http://bruneiastronomy.org/web/?p=6676 Here is the challenge – What’s the youngest moon you can see this year? The infographic will tell you when to hunt the new moon crescent (hilal), and where to locate its position in the western sky at sunset from Brunei Darussalam in 2020.

Note: Prediction method by Mohammad SH. Odeh (New Criterion For Lunar Crescent Visibility, 2005) employed new criterion visibility of the lunar crescent, V. This is only a computational analysis data. The result/declaration of the sighting/beginning of hijrah month should be referenced to official media by the Government.

It’s rare and very challenging to see a moon within 24 hours of new moon. Our PABD include monthly hilal observation to spot the youngest possible moons with digital camera, optical aid, or with the eye alone.

LunationDateSunsetMoonsetLagSun AzimuthMoon AzimuthdAzAltitudeMoon AgeDistance (km)MonthHijri
2492020-01-2518:28:5718:53:1100:24:13250° 57′ 34”249° 06′ 31”-1° 51′ 02”4° 53′ 23”12h45m396387Jamadilakhir1441
2502020-02-2418:33:3419:10:0300:36:29260° 27′ 36”258° 26′ 35”-2° 01′ 02”8° 02′ 59”19h00m403786Rejab1441
2512020-03-2418:30:2018:34:3500:04:15271° 46′ 00”267° 11′ 10”-4° 34′ 50”0° 42′ 41”01h01m406596Syaban1441
2522020-04-2318:26:2518:41:2000:14:55282° 52′ 57”279° 52′ 01”-3° 00′ 56”3° 03′ 25”07h59m403626Ramadan1441
2532020-05-2318:27:5818:59:3500:31:37290° 51′ 53”289° 59′ 41”-0° 52′ 12”6° 32′ 01”16h48m394840Syawal1441
2542020-06-2118:34:3118:38:4900:04:18293° 36′ 46”293° 43′ 01”0° 06′ 14”0° 35′ 51”03h52m387285Zulkaedah1441
2552020-07-2118:37:3919:16:2900:38:50290° 29′ 26”290° 54′ 47”0° 25′ 21”8° 00′ 13”17h03m373677Zulhijjah1441
2562020-08-1918:31:4718:52:4700:21:01282° 40′ 18”284° 55′ 06”2° 14′ 48”4° 14′ 47”07h49m365884Muharram1442
2572020-09-1818:18:1819:13:4900:55:31271° 41′ 18”269° 25′ 32”-2° 15′ 46”12° 34′ 43”23h17m357676Safar1442
2582020-10-1718:05:2018:41:1500:35:55260° 32′ 23”260° 05′ 48”-0° 26′ 35”7° 47′ 33”14h33m356196Rabiulawal1442
2592020-11-1518:01:3818:12:1700:10:39251° 21′ 16”252° 23′ 08”1° 01′ 52”1° 53′ 14”04h53m358443Rabiulakhir1442
2602020-12-1518:10:4618:51:2700:40:40246° 41′ 24”244° 02′ 54”-2° 38′ 31”8° 04′ 23”17h53m366038Jamadilawal1442

Prediction method by Mohammad SH. Odeh (New Criterion For Lunar Crescent Visibility, 2005) employed visibility of the lunar crescent by this new criterion, V= ARCV−(−0.1018W3 +0.7319W2 −6.3226W +7.1651) where: ARCV: Airless and topocentric arc of vision in degrees. W: Topocentric crescent width in arc minutes ;
V > 5.65 : Naked Eyes
2 < V < 5.65 : Optical aid / Naked eyes
-0.96 < V < 2 : Optical aid only
V < -0.96 : Not visible

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