An annular solar eclipse occurred at the Moon’s ascending node of orbit on Saturday, August 22, 1998,
with a magnitude of 0.9734. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. An annular solar eclipse occurs when the Moon's apparent diameter is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. Occurring about 5.2 days before apogee (on August 27, 1998, at 7:30 UTC), the Moon's apparent diameter was smaller.
Annularity was visible in Indonesia, Malaysia, Papua New Guinea, Solomon Islands (Bellona Island and Rennell Island) and Vanuatu. A partial eclipse was visible for parts of Southeast Asia, East Asia, Australia, and Oceania.
Observations
It is usually very dry in Malaysia in August. But due to the El Niño, it rained every day for 2 weeks before the eclipse. On the eclipse day, the Sun was seen going in and out the gaps of the clouds at first, and later the clouds dispersed near Kota Tinggi District, the observation site of NASA's Johnson Space Center. The whole annular phase was seen. The sky cleared up completely 40 minutes later.
Eclipse timing Places experiencing annular eclipse Solar eclipse of August 22, 1998(local times)Country or territory City or placeStart of partial eclipseStart of annular eclipseMaximum eclipseEnd of annular eclipseEnd of partial eclipseDuration of annularity (min:s)Duration of eclipse (hr:min)Maximum coverage Malacca City 07:10:32 08:19:13 08:20:37 08:22:01 09:44:30 2:48 2:36 92.96% Luganville 12:37:39 14:21:21 14:22:22 14:23:23 15:50:22 2:02 3:13 93.99%References:
Places experiencing partial eclipse Solar eclipse of August 22, 1998(local times)Country or territory City or placeStart of partial eclipseMaximum eclipseEnd of partial eclipseDuration of eclipse (hr:min)Maximum coverage Yangon 05:50:14 (sunrise) 06:46:47 07:52:54 2:03 39.84% Bangkok 06:14:22 07:18:13 08:32:27 2:18 52.75% Kuala Lumpur 07:10:20 08:19:55 09:43:00 2:33 91.65% Phnom Penh 06:12:28 07:21:06 08:42:18 2:30 62.74% Singapore 07:10:56 08:22:15 09:48:01 2:37 91.98% Ho Chi Minh City 06:12:09 07:22:40 08:46:35 2:34 66.45% Jakarta 06:17:11 07:29:29 08:56:53 2:40 64.67% Bandar Seri Begawan 07:13:45 08:34:02 10:12:19 2:59 90.88% Manila 07:21:20 08:40:57 10:15:35 2:54 55.56% General Santos 07:22:19 08:53:04 10:42:43 3:20 86.15% Davao City 07:22:44 08:53:26 10:42:39 3:20 82.48% Dili 07:37:39 09:08:50 10:57:44 3:20 56.58% Ngerulmud 08:36:16 10:16:28 12:10:33 3:34 75.53% Colonia 09:43:21 11:24:20 13:15:49 3:32 64.88% Darwin 09:24:48 11:00:51 12:49:38 3:25 48.14% Port Moresby 10:26:11 12:22:53 14:13:13 3:47 79.59% Cairns 10:40:17 12:29:29 14:12:35 3:32 54.61% Honiara 12:06:09 13:59:49 15:37:15 3:31 89.39% Brisbane 11:26:33 13:00:36 14:25:23 2:59 37.83% Yaren 13:23:02 15:03:30 16:29:20 3:06 47.65% Nouméa 12:45:31 14:25:37 15:50:52 3:05 74.62% Port Vila 12:43:45 14:26:10 15:52:23 3:09 92.47% Funafuti 14:08:08 15:35:45 16:49:47 2:42 51.80% Auckland 14:20:04 15:37:28 16:46:15 2:26 41.58% Suva 14:09:31 15:41:17 16:58:44 2:49 85.27% Mata Utu 14:20:32 15:44:50 16:56:28 2:36 60.89% Nuku'alofa 15:23:50 16:48:46 18:01:19 2:37 86.65% Apia 15:29:59 16:49:10 17:57:05 2:27 56.99% Alofi 15:32:44 16:52:19 18:00:50 2:28 72.80% Rarotonga 16:45:43 17:57:05 18:27:01 (sunset) 1:41 69.92%References:
Eclipse details Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the Moon's penumbra or umbra attains the specific parameter, and the second table describes various other parameters pertaining to this eclipse.
+August 22, 1998 solar eclipse times Event Time (UTC) First penumbral external contact 1998 August 21 at 23:11:19.7 UTC First umbral external contact 1998 August 22 at 00:15:19.1 UTC First central line 1998 August 22 at 00:16:42.3 UTC First umbral internal contact 1998 August 22 at 00:18:05.7 UTC First penumbral internal contact 1998 August 22 at 01:26:40.7 UTC Greatest duration 1998 August 22 at 01:59:47.4 UTC Ecliptic conjunction 1998 August 22 at 02:04:08.9 UTC Greatest eclipse 1998 August 22 at 02:07:10.5 UTC Equatorial conjunction 1998 August 22 at 02:15:05.3 UTC Last penumbral internal contact 1998 August 22 at 02:47:26.3 UTC Last umbral internal contact 1998 August 22 at 03:56:07.6 UTC Last central line 1998 August 22 at 03:57:33.7 UTC Last umbral external contact 1998 August 22 at 03:58:59.8 UTC Last penumbral external contact 1998 August 22 at 05:03:03.8 UTC
+August 22, 1998 solar eclipse parameters Parameter Value Eclipse magnitude 0.97336 Eclipse obscuration 0.94742 Gamma −0.26441 Sun right ascension 10h03m45.9s Sun declination +11°53'26.2" Sun semi-diameter 15'48.7" Sun equatorial horizontal parallax 08.7" Moon right ascension 10h03m30.7s Moon declination +11°39'14.3" Moon semi-diameter 15'09.7" Moon equatorial horizontal parallax 0°55'38.7" ΔT 63.3 s
Eclipse season
This eclipse is part of an eclipse season, a period, roughly every six months, when eclipses occur. Only two (or occasionally three) eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months (173 days) later; thus two full eclipse seasons always occur each year. Either two or three eclipses happen each eclipse season. In the sequence below, each eclipse is separated by a fortnight. The first and last eclipse in this sequence is separated by one synodic month.
+ Eclipse season of August–September 1998 August 8Descending node (full moon) August 22Ascending node (new moon) September 6Descending node (full moon) Penumbral lunar eclipseLunar Saros 109 Annular solar eclipseSolar Saros 135 Penumbral lunar eclipseLunar Saros 147
Related eclipses Eclipses in 1998 A total solar eclipse on February 26 A penumbral lunar eclipse on March 13 A penumbral lunar eclipse on August 8 An annular solar eclipse on August 22 A penumbral lunar eclipse on September 6
Metonic Preceded by: Solar eclipse of November 3, 1994 Followed by: Solar eclipse of June 10, 2002
Tzolkinex Preceded by: Solar eclipse of July 11, 1991 Followed by: Solar eclipse of October 3, 2005
Half-Saros Preceded by: Lunar eclipse of August 16, 1989 Followed by: Lunar eclipse of August 28, 2007
Tritos Preceded by: Solar eclipse of September 23, 1987 Followed by: Solar eclipse of July 22, 2009
Solar Saros 135 Preceded by: Solar eclipse of August 10, 1980 Followed by: Solar eclipse of September 1, 2016
Inex Preceded by: Solar eclipse of September 11, 1969 Followed by: Solar eclipse of August 2, 2027
Triad Preceded by: Solar eclipse of October 22, 1911 Followed by: Solar eclipse of June 22, 2085
Solar eclipses of 1997–2000
Saros 135
Metonic series
Tritos series
Inex series
Notes
References
External links
Photos: An Annular Eclipse of the Sun APOD 8/24/1998, from Mersing on the East Coast of Malaysia