{"id":"vidhyamitra:city-day:perth:2161-01-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2161-01-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2161-01-18","date_display":"January 18, 2161 CE","panchanga":{"method":"Sūrya Siddhānta + Bhāskara-II iterative manda + Kerala-school (Mādhava-Nīlakaṇṭha) evection + variation + annual equation","engine_version":"2.0 (Kerala-school enhanced)","accuracy_note":"Sub-degree on Moon at any Kali-Yuga date (~2-5° residual max)","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":2161,"month":1,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2510366.770833,"kali_year":5262,"ahargana":1921901.2708,"sun":{"sidereal_longitude":271.5915,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":170.129,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":258.5376,"elapsed_within_tithi_degrees":6.5376},"nakshatra":{"number":13,"name":"Hasta","pada":4,"moon_longitude":170.129,"elapsed_within_degrees":10.129},"yoga":{"number":7,"name":"Sukarma","sum_longitude":81.7205},"karana":{"half_tithi_index":43,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"sky":{"method":"Sūrya-Siddhāntic Bhāskara-II 4-step iteration with atan2-based śīghra + varying peripheries + lunar latitude","engine_version":"3.0 (Pūrṇa — complete SS implementation)","tradition_sources":"Āryabhaṭīya 499 CE → SS Ch.1-5 Burgess 1860 → Siddhānta-Śiromaṇi Bhāskara II 1150 → Tantrasaṅgraha Nīlakaṇṭha 1501","input":{"year":2161,"month":1,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2510366.770833,"ahargana":1921901.2708,"kali_year":5262,"ayanamsa_lahiri":26.1027,"grahas":{"sun":{"sidereal_longitude":272.07328600000005,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":173.92638599999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false,"latitude":-3.8273},"mars":{"sidereal_longitude":214.97968600000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":253.56248600000004,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":true},"jupiter":{"sidereal_longitude":220.40388600000006,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":301.934486,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":true},"saturn":{"sidereal_longitude":203.22688599999992,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":228.4218,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":48.4218,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":false}},"panchang":{"method":"Sūrya Siddhānta + Bhāskara-II iterative manda + Kerala-school (Mādhava-Nīlakaṇṭha) evection + variation + annual equation","engine_version":"2.0 (Kerala-school enhanced)","accuracy_note":"Sub-degree on Moon at any Kali-Yuga date (~2-5° residual max)","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":2161,"month":1,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2510366.770833,"kali_year":5262,"ahargana":1921901.2708,"sun":{"sidereal_longitude":271.5915,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":170.129,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":258.5376,"elapsed_within_tithi_degrees":6.5376},"nakshatra":{"number":13,"name":"Hasta","pada":4,"moon_longitude":170.129,"elapsed_within_degrees":10.129},"yoga":{"number":7,"name":"Sukarma","sum_longitude":81.7205},"karana":{"half_tithi_index":43,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.827,"elongation":101.462},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.827,"opposition_distance":78.538}},"eclipse_window_40days":[]},"city":{"slug":"perth","name":"Perth, Australia","lat":-31.9505,"lon":115.8605,"tz_offset_hours":8,"country":"AU","tier":"diaspora"},"tier2":{"city":{"slug":"perth","name":"Perth, Australia","lat":-31.9505,"lon":115.8605,"tz_offset_hours":8,"country":"AU","tier":"diaspora"},"sunriseLocal":"05:29","sunsetLocal":"19:25","solarNoonLocal":"12:27","dayLengthHours":13.944339536486256,"dayLengthDisplay":"13 Hours 56 Mins 40 Secs","nightLengthDisplay":"10 Hours 03 Mins 20 Secs","moonriseLocal":"23:32","moonsetLocal":"12:17","rahuKala":{"name":"Rāhu Kāla","start":"17:41","end":"19:25","startHours":17.677581152543837,"endHours":19.42062359460462,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:27","end":"14:11","startHours":12.448453826361494,"endHours":14.191496268422275,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:56","end":"17:41","startHours":15.934538710483057,"endHours":17.677581152543837,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:44","end":"09:12","startHours":8.729963283298492,"endHours":9.194774601181367,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:03","end":"06:26","startHours":6.057298205471959,"endHours":6.429147259778259,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:59","end":"12:55","startHours":11.983642508478619,"endHours":12.913265144244368,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:37","end":"04:33","startHours":3.617038786586864,"endHours":4.5466614223526145,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:19","end":"05:29","startHours":4.314255763411177,"endHours":5.476284058118365,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:46","end":"15:42","startHours":14.772510415775868,"endHours":15.702133051541617,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:13","end":"19:37","startHours":19.22062359460462,"endHours":19.62062359460462,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:25","end":"20:00","startHours":19.42062359460462,"endHours":20.001637741958213,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:10","end":"20:55","startHours":19.17062359460462,"endHours":20.92062359460462,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:59","end":"00:55","startHours":23.983642508478617,"endHours":24.91326514424437,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:29","end":"07:13","startHours":5.476284058118365,"endHours":7.219326500179147,"quality":"inauspicious"},{"name":"Chala","start":"07:13","end":"08:58","startHours":7.219326500179147,"endHours":8.962368942239928,"quality":"neutral"},{"name":"Labha","start":"08:58","end":"10:42","startHours":8.962368942239928,"endHours":10.70541138430071,"quality":"auspicious"},{"name":"Amṛta","start":"10:42","end":"12:27","startHours":10.70541138430071,"endHours":12.448453826361494,"quality":"auspicious"},{"name":"Kāla","start":"12:27","end":"14:11","startHours":12.448453826361494,"endHours":14.191496268422275,"quality":"inauspicious"},{"name":"Śubha","start":"14:11","end":"15:56","startHours":14.191496268422275,"endHours":15.934538710483057,"quality":"auspicious"},{"name":"Roga","start":"15:56","end":"17:41","startHours":15.934538710483057,"endHours":17.677581152543837,"quality":"inauspicious"},{"name":"Udveg","start":"17:41","end":"19:25","startHours":17.677581152543837,"endHours":19.42062359460462,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"19:25","end":"20:41","startHours":19.42062359460462,"endHours":20.677581152543837,"quality":"auspicious"},{"name":"Roga","start":"20:41","end":"21:56","startHours":20.677581152543837,"endHours":21.934538710483057,"quality":"inauspicious"},{"name":"Udveg","start":"21:56","end":"23:11","startHours":21.934538710483057,"endHours":23.191496268422274,"quality":"inauspicious"},{"name":"Chala","start":"23:11","end":"00:27","startHours":23.191496268422274,"endHours":24.448453826361494,"quality":"neutral"},{"name":"Labha","start":"00:27","end":"01:42","startHours":24.448453826361494,"endHours":25.70541138430071,"quality":"auspicious"},{"name":"Amṛta","start":"01:42","end":"02:58","startHours":25.70541138430071,"endHours":26.962368942239927,"quality":"auspicious"},{"name":"Kāla","start":"02:58","end":"04:13","startHours":26.962368942239927,"endHours":28.219326500179147,"quality":"inauspicious"},{"name":"Śubha","start":"04:13","end":"05:29","startHours":28.219326500179147,"endHours":29.476284058118367,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:29","end":"06:29","startHours":5.476284058118365,"endHours":6.476284058118365,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:29","end":"07:29","startHours":6.476284058118365,"endHours":7.476284058118365,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:29","end":"08:29","startHours":7.476284058118365,"endHours":8.476284058118365,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:29","end":"09:29","startHours":8.476284058118365,"endHours":9.476284058118365,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:29","end":"10:29","startHours":9.476284058118365,"endHours":10.476284058118365,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:29","end":"11:29","startHours":10.476284058118365,"endHours":11.476284058118365,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:29","end":"12:29","startHours":11.476284058118365,"endHours":12.476284058118365,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:29","end":"13:29","startHours":12.476284058118365,"endHours":13.476284058118365,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:29","end":"14:29","startHours":13.476284058118365,"endHours":14.476284058118365,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:29","end":"15:29","startHours":14.476284058118365,"endHours":15.476284058118365,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:29","end":"16:29","startHours":15.476284058118365,"endHours":16.476284058118367,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:29","end":"17:29","startHours":16.476284058118367,"endHours":17.476284058118367,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:29","end":"18:29","startHours":17.476284058118367,"endHours":18.476284058118367,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:29","end":"19:29","startHours":18.476284058118367,"endHours":19.476284058118367,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:29","end":"20:29","startHours":19.476284058118367,"endHours":20.476284058118367,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:29","end":"21:29","startHours":20.476284058118367,"endHours":21.476284058118367,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:29","end":"22:29","startHours":21.476284058118367,"endHours":22.476284058118367,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:29","end":"23:29","startHours":22.476284058118367,"endHours":23.476284058118367,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:29","end":"00:29","startHours":23.476284058118367,"endHours":24.476284058118367,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:29","end":"01:29","startHours":24.476284058118367,"endHours":25.476284058118367,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:29","end":"02:29","startHours":25.476284058118367,"endHours":26.476284058118367,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:29","end":"03:29","startHours":26.476284058118367,"endHours":27.476284058118367,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:29","end":"04:29","startHours":27.476284058118367,"endHours":28.476284058118367,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:29","end":"05:29","startHours":28.476284058118367,"endHours":29.476284058118367,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"West (Paścim)","chandraVasa":"North-West","rahuVasa":"North-East","anandadiYoga":{"name":"Mānasa","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-20.524124261300763,"eotMinutes":-10.349229581689698,"ayanamsa":26.1027}},"calendars":{"vikram_samvat":2218,"vikram_samvatsara":"Bhāva","saka_samvat":2083,"saka_samvatsara":"Durmati","bengali_samvat":1568,"malayalam_era":1337,"nanakshahi_year":692,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Māgha","lunar_month_amanta":"Pauṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Saptamī · Vikram 2218 Bhāva · Śaka 2083 Durmati"},"festivals":[],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"perth"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga January 18, 2161 CE · Perth, Australia · Vidhyamitra","description":"January 18, 2161 CE for Perth, Australia: Kṛṣṇa Saptamī, sūryodaya 05:29, sūryāsta 19:25.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2161-01-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2161-01-18","sa":"https://sa.vidhyamitra.com/city/perth/2161-01-18","hi":"https://hi.vidhyamitra.com/city/perth/2161-01-18","x-default":"https://vidhyamitra.com/city/perth/2161-01-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T15:49:58.161Z","verification":{"type":"multi-marker","confidence":"canonical"}},{"pillar":"Vidhyamitra-Tier2","pillar_version":"0.1.0","method":"Spherical astronomy + Lahiri ayanamsa + standard solar declination + EoT correction","retrieved_at":"2026-05-31T15:49:58.161Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T15:49:58.161Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}