2023年二十四節氣時間

资料整理：高良超、杨旸，历表：VSOP87
时刻系东经120度平太阳时（北京时间）
本年力学时与世界时之差ΔT取70.0秒

地球轨道位置

地球通过轨道近日点 2023/1/5 00:17 距离0.983296AU
地球通过轨道远日点 2023/7/7 04:07 距离1.016681AU

二十四节气（地心视象）

2023/01/05 23:04:49 小寒（节）太阳视黄经285° 太阳视赤纬-22°36′
2023/01/20 16:29:32 大寒（中）太阳视黄经300° 太阳视赤纬-20°09′
2023/02/04 10:42:31 立春（节）太阳视黄经315° 太阳视赤纬-16°21′
2023/02/19 06:34:17 雨水（中）太阳视黄经330° 太阳视赤纬-11°29′
2023/03/06 04:36:12 惊蛰（节）太阳视黄经345° 太阳视赤纬-5°54′
2023/03/21 05:24:25 春分（中）太阳视黄经0° 太阳视赤纬0° 太阳过天赤道，进入北半球
2023/04/05 09:13:02 清明（节）太阳视黄经15° 太阳视赤纬+5°54′
2023/04/20 16:13:36 谷雨（中）太阳视黄经30° 太阳视赤纬+11°29′
2023/05/06 02:18:44 立夏（节）太阳视黄经45° 太阳视赤纬+16°21′
2023/05/21 15:09:09 小满（中）太阳视黄经60° 太阳视赤纬+20°09′
2023/06/06 06:18:19 芒种（节）太阳视黄经75° 太阳视赤纬+22°36′
2023/06/21 22:57:48 夏至（中）太阳视黄经90° 太阳视赤纬最北+23°26′
2023/07/07 16:30:40 小暑（节）太阳视黄经105° 太阳视赤纬+22°36′
2023/07/23 09:50:26 大暑（中）太阳视黄经120° 太阳视赤纬+20°09′
2023/08/08 02:22:51 立秋（节）太阳视黄经135° 太阳视赤纬+16°21′
2023/08/23 17:01:17 处暑（中）太阳视黄经150° 太阳视赤纬+11°28′
2023/09/08 05:26:40 白露（节）太阳视黄经165° 太阳视赤纬+5°55′
2023/09/23 14:49:57 秋分（中）太阳视黄经180° 太阳视赤纬0° 太阳过天赤道，进入南半球
2023/10/08 21:15:33 寒露（节）太阳视黄经195° 太阳视赤纬-5°55′
2023/10/24 00:20:50 霜降（中）太阳视黄经210° 太阳视赤纬-11°29′
2023/11/08 00:35:34 立冬（节）太阳视黄经225° 太阳视赤纬-16°20′
2023/11/22 22:02:40 小雪（中）太阳视黄经240° 太阳视赤纬-20°08′
2023/12/07 17:32:55 大雪（节）太阳视黄经255° 太阳视赤纬-22°35′
2023/12/22 11:27:20 冬至（中）太阳视黄经270° 太阳视赤纬最南-23°26′

节气时刻表示地球绕太阳运行时在轨道上的不同位置。从地球上看，太阳在黄道上运动，一回归年运行一周。太阳在黄道上的位置用地心视黄经（apparent geocentric ecliptic longitude）度量，从春分点（黄道与赤道的焦点）算起，从0°到360°。

紫金山天文台

作为我国权威的天文测算部门，紫金山天文台负责实施我国的日历编算和发布，每年编算次一年的农历日历，其中包括朔望和节气时刻，时间均精确到分钟，作为标准在每年出版的《中国天文年历》中正式发表，并以《日历资料》的形式对外发布。

skyfield almanac solar terms

Skyfield positions,

Barycentric → Astrometric → Apparent

If using JPL Horizons web , choose

Ephemeris Type: Observer Table

Target Body: Sun[Sol]

Observer location: Geocentric (Code 500)

Table settings select also 31. "Observer Ecliptic lon. and lat." , ie ObsEcLon,

Reference Frame: ICRF

Kumkee github

Scythians 斯泰基塞種西古提人

900 BC - 200 AD British museum Tomb of scythe prince, Buktarma valley, 1200 masl, Google map Herodotus 絲路上的帝國 Biblegeography 哥羅西書 3：11 在此並不分希利尼人、猶太人、受割禮的、未受割禮的、化外人、西古提人、為奴的、自主的．惟有基督是包括一切、又住在各人之內。塞種塞迦 saka 史記漢書西域傳：塞種 ctext 昔匈奴破大月氏，大月氏西君大夏，而塞王南君罽賓。塞種分散，往往為數國。自疏勒以西北，休循、捐毒之屬，皆故塞種也。匈奴列傳 Ctext ：塞王《史記》在《大宛列傳》與《匈奴列傳》中，詳細記錄了中亞至天山一帶的塞種（塞王、塞地）狀況。例如，文中記載了月氏西破走塞王，導致塞人南遷越過懸度（今帕米爾高原及克什米爾一帶） Baike Genetic history Genetics Nih griffin ? Scytho-Siberian world 塞迦 saka wiki Disappeared? Sarmatians （薩爾馬泰，奄蔡史記 , Aorsi ）and goths YouTube

閱讀完整內容

calculate pH of phosphoric acid

Question: adding 1/4 teaspoon of 10% phosphoric acid to 19 litres of water, what will be the pH? Let's go through the calculations step by step. Step 1. Convert mass ( or volume) of 10% phosphoric acid to mole per litre ( mol/L) The above calculation shows that 1/4 tsp of H3PO4 acid is 6.97e-5 mol/L Step 2. Input this value to BATE (or other app) to calculate pH The answer: pH = 4.16, ie too acidic !? If you use pipette instead of teaspoon, 1 drop = 0.05ml. So 1/4 TSP means roughly 25 drops If you actually aim for pH 5.6 (which is optimum pH for mashing), conc will be 2.51 e-6, or 1/100 tsp , 0.044 ml, roughly 1 drop Let's roll back a bit. From recipes of BarleyWine , summer rye , hefe Gordon Strong suggested to use 1/4 teaspoon of 10% phosphoric acid, which is targeting pH of 5.5..... Discussion on homebrewtalk forum. However using online BF water calc , Sparge pH would be 4.6. but he also added 1 tsp of CaCl2. 2H20. Mash pH change from 5.7 t...

閱讀完整內容

ES8311 and ES8388 codec IC

ES8388 audio codec module is one of the audio codec modules available that is supported by ESP32 and official ESP-ADF releases. The ES8388 module lets you have: Stereo microphone and line input Stereo headphone and line out Up to 96 kHz 24 bpp high quality audio This module is compatible with all MCUs that have I2C and I2S ports (like ESP32, ESP8266, STM32, i.MX6, Raspberry Pi, etc) ES8311 Maxgerhardt github PCBartist twblogs ESP32-A1S (limited stock)Audio codec AC101 or ES8388 built-in. NB the pinouts and firmware are different! Arduino - ESP31-A1S instructable Phil Schatzmann and his github Simple A2DP thaaraak github on ESP32-A1S github of Yveaux and Marcel-licence ESP ADF example: Logitech PiCorePlayer squeeze lite squeezebox forum ESP32-Audio-kit (from AI thinker) based on ESP32-A1S, is simple and small. But upgrade-ability seems limited Alex John Talbert mixer equalizer: can this be used as simple equalizer? how about proces...

閱讀完整內容

Hello!! It's Joseph

搜尋此網誌