ALPO METEOR SHOWER LIST
from The Assn of Lunar and Planetary Observers (ALPO) - with additions in italics

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Shower (Activity)               Dates           Max.   Radiant Posit.  Rad. Drift     Vel.     ZHR    Shower   Source
						Date      at Max.      	 deg/day     km/sec     at    Rating
							 RA     DEC   	RA     DEC
QUADRANTIDS  (QUA)	   	01/01-01/05	01/03	15:20   +49	2.0   -0.2	41	120	I	IMO
GAMMA  VELIDS  (GVE)		01/01-01/15	01/05	08:20   -47	4.4   -0.4	35	2	IV	DMS
ALPHA  CRUCIDS  (ACR)		01/06-01/28	01/15	12:48   -63	4.4   -0.4	50	3	IV	DMS
DELTA  CANCRIDS  (DCA)		01/01-01/31	01/17	08:40   +20	3.6   -0.2	28	4	II	IMO
ALPHA  HYDRIDS  (AHY)		01/05-02/14	01/19	08:52   -11	2.8   -0.3	44	2	IV	DMS
ALPHA  CARINIDS  (CAN)		01/24-02/09	01/30	06:20   -54	1.6    0.0	25	2	IV	DMS
DELTA  VELIDS  (DVE)		01/22-02/21	02/05	08:44   -52	2.0   -0.3	35	1	IV	DMS
ALPHA  CENTAURIDS (ACE)		01/28-02/21	02/07	14:00   -59	5.2   +1.3	56	6	II	IMO
OMICRON  CENTAURIDS (OCE)	01/31-02/19	02/11	11:48   -56	3.6   -0.4	51	2	IV	DMS
THETA  CENTAURIDS  (TCE)	01/23-03/12	02/21	14:00   -41	4.4   -0.4	60	4	IV	DMS
FEBRUARY  LEONIDS  (FLE)	02/01-02/28	SEVERAL	11:00   +06	2.0   -0.3	30	5	II	LUNSFORD
DELTA  LEONIDS  (DLE)		02/15-03/10	02/24	11:12   +16	3.6   -0.3	23	2	II	IMO
GAMMA  NORMIDS  (GNO)		02/25-03/22	03/13	16:36   -51	4.4   +0.1	56	8	II	IMO
VIRGINIDS  (VIR)		03/01-04/15	SEVERAL	13:00   -04	3.6   -0.3	30	5	II	IMO
DELTA  PAVONIDS  (DPA)		03/11-04/16	03/30	13:00   -05	3.6   -0.4	31	5	IV	DMS
LIBRIDS  (LBR)			04/15-04/30	SEVERAL	15:12   -18	4.4   -0.2	30	5	II	LUNSFORD
LYRIDS  (LYR)			04/15-04/28	04/22	18:04   +34	4.4    0.0	49	15	I	IMO
APRIL FIREBALLS (NB:see notes)  04/22-04-30     04/22   12:12~24 -26~36
PI  PUPPIDS  (PPU)		04/15-04/28	04/23	07:20   -45	2.4   -0.2	18	VAR	III	IMO
ALPHA  BOOTIDS  (ABO)		04/14-05/12	04/28	14:32   +19	3.6   -0.1	20	2	IV	LUNSFORD
MU  VIRGINIDS  (MVI)		04/01-05/12	04/29	15:08   -07	2.0   -0.3	30	2	IV	DMS
OMEGA  CAPRICORNIDS  (WCA)	04/19-05/15	05/02	21:00   -22	3.6   +0.3	50	2	IV	LUNSFORD
ETA  AQUARIDS  (ETA)		04/19-05/28	05/06	22:32   -01	3.6   +0.4	66	60	I	IMO
ALPHA  SCORPIIDS  (ASC)		05/01-05/31	05/16	16:12   -21	4.4   -0.1	35	5	II	LUNSFORD
BETA  CORONA  AUST.  (CAU)	04/23-05/30	05/16	18:56   -40	5.2   +0.1	45	3	IV	DMS
OMEGA SCORPIIDS  (OSC)		05/23-06/15	06/02	15:56   -20	4.0   -0.1	21	5	IV	DMS
ARIETIDS  (DAR)			05/22-07/02	06/07	02:56   +24	2.8   +0.6	38	54	IV	IMO
SAGITTARIDS  (SAG)		06/01-07/15	06/19	18:16   -23	4.0   +0.1	30	5	II	IMO
TAU  CETIDS  (CET)		06/18-07/04	06/27	01:36   -12	3.6   +0.4	66	4	IV	DMS
JUNE  BOOTIDS  (JBO)		06/28-06/28	06/28	14:36   +49			14	VAR	III	IMO
TAU AQUARIDS  (TAQ)		06/19-07/05	06/28	22:48   -12	4.0   +0.4	63	7	IV	DMS
THETA OPHIUCHIDS  (TOP)		06/04-07/15	06/29	16:36   -15	4.4   +0.1	29	2	IV	DMS
JULY PEGASIDS  (JPE)		07/07-07/13	07/10	22:40   +15	3.2   +0.2	70	3	II	IMO
JULY PHOENICIDS  (PHE)		07/10-07/16	07/13	02:08   -48	4.2   +0.2	47	VAR	III	IMO
ALPHA CYGNIDS  (ACG)		07/11-07/30	07/18	20:20   +47	2.4   +0.2	37	2	IV	DMS
SIGMA CAPRICORNIDS  (SCP)	07/15-08/11	07/20	20:28   -15	4.0   +0.2	30	5	IV	LUNSFORD
PISCES AUSTRINIDS  (PAU)	07/15-08/10	07/28	22:44   -30	4.0   +0.2	35	5	II	IMO
SOUTH DELTA AQUARIDS  (SDA)	07/12-08/19	07/28	22:36   -16	3.2   +0.2	41	20	I	IMO
ALPHA CAPRICORNIDS  (CAP)	07/030-8/15	07/30	20:28   -10	3.6   +0.3	23	4	II	IMO
SOUTH IOTA AQUARIDS  (SIA)	07/25-08/15	08/04	22:16   -15	4.3   +0.2	34	2	II	IMO
NORTH DELTA AQUARIDS  (NDA)	07/15-08/25	08/08	22:20   -05	4.0   +0.2	42	4	II	IMO
PERSEIDS  (PER)			07/17-08/24	08/12	03:04   +58	5.4   +0.1	59	90	I	IMO
KAPPA CYGNIDS  (KCG)		08/03-08/25	08/17	19:04   +59	2.4   +0.3	25	3	II	IMO
NORTH IOTA AQUARIDS  (NIA)	08/11-08/31	08/20	21:48   -06	4.0   +0.1	31	3	II	IMO
PI ERIDANIDS  (ERI)		08/20-09/05	08/25	03:28   -15	3.2   +0.3	59	4	IV	DMS
GAMMA DORADIDS  (GDO)		08/19-09/06	08/28	04:36   -50	2.0   +0.2	41	5	IV	DMS
ALPHA AURIGIDS  (AUR)		08/25-09/05	09/01	05:36   +42	4.4    0.0	66	10	II	IMO
SEPTEMBER  PERSEIDS  (SPR)	09/05-10/10	09/08	04:00   +47	4.0   +0.1	64	6	II	LUNSFORD
ARIES-TRIANGULIDS  (ATR)	09/09-09/16	09/12	02:00   +29	4.0   +0.2	35	3	IV	LUNSFORD
PISCIDS  (SPI)			09/01-09/30	09/20	00:32    00	3.6   +0.2	26	3	II	IMO
KAPPA  AQUARIDS  (KAQ)		09/08-09/30	09/20	22:36   -02	4.0   +0.2	16	3	IV	DMS
OCTOBER  ARIETIDS  (OAR)	10/01-10/31	10/08	02:08   +08	3.6   +0.3	28	5	II	LUNSFORD
GIACOBINIDS  (GIA)		10/06-10/10	10/08	17:28   +54 			20	VAR	III	IMO
DELTA  AURIGIDS  (DAU)		09/22-10/23	10/10	05:40   +52	4.8   +0.1	64	6	II	LUNSFORD
EPSILON  GEMINIDS  (EGE)	10/14-10/27	10/18	06:56   +27	4.0    0.0	71	2	II	IMO
ORIONIDS  (ORI)			10/02-11/07	10/21	06:20   +16	4.8   +0.1	66	20	I	IMO
LEO  MINORIDS  (LMI)		10/21-10/23	10/22	10:48   +37	4.0   -0.4	62	2	IV	DMS
SOUTHERN  TAURIDS  (STA)	11/01-11/25	11/05	03:28   +13	3.2   +0.2	27	5	II	IMO
DELTA  ERIDANIDS  (DER)		11/06-11/29	11/10	03:52   -09	3.6   +0.2	31	2	IV	DMS
NORTHERN  TAURIDS  (NTA)	11/01-11/25	11/12	03:52   +22	3.2   +0.2	29	5	II	IMO
ZETA  PUPPIDS  (ZPU)		11/02-12/20	11/13	07:48   -42	2.8   -0.2	41	3	IV	DMS
LEONIDS  (LEO)			11/14-11/21	11/17	10:12   +22	2.8   -0.4	71	VAR	III	IMO
ALPHA  MONOCEROTIDS  (AMO)	11/15-11/25	11/21	07:20   +03	4.4    0.0	60	VAR	III	IMO
CHI  ORIONIDS  (XOR)		11/25-12/31	12/02	05:28   +23	4.8    0.0	28	3	II	IMO
PHOENICINIDS  (PHO)		11/28-12/09	12/06	01:12   -53	3.2   +0.4	18	VAR	III	IMO
MONOCEROTIDS  (MON)		11/27-12/17	12/09	06:48   +08	3.1   +0.24	43	3	II	IMO
SIGMA  HYDRIDS  (HYD)		12/03-12/15	12/12	08:28   +02	2.8   -0.2	58	2	II	IMO
PUPPID-VELIDS  (VEL)		12/02-12/16	12/12	09:00   -46	3.2   -0.4	40	4	II	IMO
GEMINIDS  (GEM)			12/07-12/17	12/14	07:28   +33	4.0   -0.08	35	120	I	IMO
COMA  BERENICIDS  (COM)		12/12-01/23	12/20	11:40   +25	3.2   -0.3	65	5	II	IMO
URSIDS  (URS)			12/17-12/26	12/22	14:28   +76	0.0   -0.4	33	10	I	IMO



					NOTES

Meteor showers are best seen on or near the date of maximum activity.
To see a meteor shower at its best the radiant must be more than
halfway up in the sky. Unfortunately most showers are best seen only
during the early morning hours.  Radiants with a positive declination
are better seen from the Northern Hemisphere while those with minus
declinations are better seen from the Southern Hemisphere.

The radiant drift is the daily motion in minutes eastward in right
ascension and either north or south in tenths of a degree for
delcination. This is useful for determining the radiant position away
from the night of maximum activity. The average drift is 4.0 minutes
eastward and 0.2 or 0.3 degrees north or south per day. Please remember
that the radiant position will lie west of the listed position before
the date of maximum activity
 and east of the listed position after the date of maximum activity.

 "With regards to velocity, 0-25 km/sec. is considered slow, 25-50
 km/sec. is considered average, and 50-75 km/sec. is considered swift."

 A showers rating is a measurement of its strength and reliability. The
 4 classes are described below:

 I - The strongest annual showers with ZHR's always above 10 at maximum
 activity.  

 II - Dependable minor showers with ZHR's of a least 3 at
 maximum activity.  

 III - Showers with irregular rates. The display may
 be strong one year and totally absent the next.  

 IV - Weak minorshowers that are difficult to separate from the sporadic
 background.  These showers are best left to the most experienced
 observers who use plotting and velocity to determine a meteors
 classification.


 Sources:

 DMS - Dutch Meteor Society
 IMO - International  Meteor Organization 
 Lunsford - Association of Lunar & Planetary Observers

                                 Additional Notes
 April Fireballs:

•To: meteorobs@atmob.org 
•Subject: Re: (meteorobs) Coma Berenicid Meteors Seen! 
•From: Skywayinc@aol.com 
•Date: Thu, 17 Apr 2003 11:11:57 EDT 
•Delivered-To: meteorobs-mhonarc2@galaxy.atmob.org 
•Delivered-To: meteorobs@atmob.org 
•Reply-To: meteorobs@atmob.org 
•Sender: owner-meteorobs@atmob.org 

    Back in the 1970s there was talk of a meteorite-dropping 
swarm that intersected the Earth's orbit during the second 
half of April.  In fact, here is an exerpt from the 1991 
edition of Guy Ottewell's Astronomical Calendar:
"April Fireballs," Apr. 15-30, an annual sparse irregular shower of 
bright meteors some of which reach Earth as meteorites."

Also in the September 1970 S&T, in the News Notes section, page 138, 
there is an item concerning "April Meteorite Coincidences."  The notation speaks 
of the similarity between the calculated orbits of a shadow-casting 
fireball that passed over northern New Jersey on April 23, 1962 and a bolide 
which dropped meteorites over England, Wales and northern Ireland on April 
25, 1969.

The late Charles P. Olivier provided a preliminary orbit for the 1962 
fireball based on 80 observations, finding a radiant at RA 183-degrees 
(12hrs 12min), declination -26-degrees.  For the 1969 bolide, British workers 
used a computer at the University of Liverpool to analyze over 300 sightings 
and found a radiant point at RA 186-degrees (12hrs 24 min.), declination 
-31-degrees.  Two sets of orbital elements were later computed and were 
found to be "remarkably similar, differing by less than their uncertainties."

Lastly . . . in the June 1970 Journal of the British Astronomical 
Asociation, Keith B. Hindley and Howard G. Miles suggested that: "The period April 
23-26 should be covered in the future by amateur and professional groups in 
the hope of recording further associated fireballs and perhaps meteorite 
falls."

/end/