2021 BRIGHT STAR OCCULTATIONS


All times given in these predictions are in Universal Time. Predictions included both disappearance and reappearance times, although depending on the phase of the moon, one or the other may not be possible to observe at the instant of the event. When Moon % is "+" (waxing), the star will disappear on the dark side (DD), and reappearance is on the bright side (RB); when the Moon % is "-" (waning), the star will reappear on the dark side (RD), and disappearance on the bright side (DB). Observing disappearances and reappearance of stars on the bright side are difficult, and accuracies in timing these events are not reliable. Therefore they are not given in the predictions.

Observers are encouraged to download and install the Occult software program to generate predictions for their own particular site coordinates. Occult will generate stars fainter than what are shown here, which can be suited to the size of your telescope. The Occult software includes a tutorial on getting it set up for your location and how to generate your first set of predictions. A PDF file written by David Dunhams about the Occult predictions and software can also give added information.

The world map is a Mercator projection showing the basic circumstances of an occultation:

Where a line represent a feature of the event is located in the polar regions, remember that the Mercator projection gives rise to serious distortions in polar regions.

Predictions and world path maps were generated using Occult v4.10.6

You are encouraged to generate predictions for your own site coordinates with many more fainter occultations, by downloading the free Occult software for your own use. After installation, there is a tutorial in the program which will guide you through the fundamental operations.

Note: Cities will be prefixed with their 2 letter country code. Those for the United States will also include the 2 letter state code after the city. For a complete listing of the 2 letter country codes used in the predictions please download this PDF file for reference.

How to convert the predicted time to your site location time using the A/B factor

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DATE STAR NAME MAG PH % ILL GENERAL AREA







02 Jan 2021 ZC1484 η Leo 3.5m RD 85- nw Africa, Middle East, s Asia
04 Jan 2021 ZC1651 ι Leo 3.9m RD 72- s South America
04 Jan 2021 ZC1702 ν Vir 4.0m RD 67- n Asia, Japan
09 Jan 2021 ZC2302 β Sco 2.6m RD 15- Hawaii
26 Jan 2021 ZC1030 ε Gem 3.1m DD 95+ se Asia
27 Jan 2021 ZC1170 κ Gem 3.6m DD 98+ s & se Asia
30 Jan 2021 ZC1484 η Leo 3.5m RD 97- s USA, Mexico, Central America, Caribbean
31 Jan 2021 ZC1651 ι Leo 3.9m RD 90- s Australia, s New Zealand







01 Feb 2021 ZC1702 ν Vir 4.0m RD 87- s Greenlalnd, Europe, n Central America
05 Feb 2021 ZC2302 β Sco 2.6m RD 36- se Asia
06 Feb 2021 ZC2307 ω1 Sco 3.9m RD 36- ne Asia
08 Feb 2021 ZC2672 λ Sag 2.8m RD 13- w Africa
22 Feb 2021 ZC1030 ε Gem 3.1m DD 79+ w central Africa, Carribbean
24 Feb 2021 ZC1170 κ Gem 3.6m DD 87+ se USA, Caribbean, n South America, w central Africa
28 Feb 2021 ZC1702 ν Vir 4.0m RD 98- seUSA, Mexico, Central America, w South America







05 Mar 2021 ZC2302 β Sco 2.6m RD 60- ne South America, w central Africa
05 Mar 2021 ZC2307 ω1 Sco 3.9m RD 59- nw Africa, w Europe
07 Mar 2021 ZC2672 &lamda; Sag 2.8m RD 33- Hawaii
08 Mar 2021 ZC2750 σ Sag 2.1m RD 29- n central Asia
22 Mar 2021 ZC1030 ε Gem 3.1m DD 57+ Hawaii
23 Mar 2021 ZC1170 κ Gem 3.6m DD 68+ e Asia, Japan, Hawaii
26 Mar 2021 ZC1484 η Leo 3.5m DD 89+ Caribbean, w Africa
27 Mar 2021 ZC1651 ι Leo 3.9m DD 97+ s Australia







01 Apr 2021 ZC2302 β Sco 2.6m RD 81- Polynesia
01 Apr 2021 ZC2307 ω1 Sco 3.9m RD 81- Hawaii, Aleutian Islands
02 Apr 2021 ZC2500 θ Oph 3.3m RD 68- ne Asia
03 Apr 2021 ZC2672 λ Sag 2.8m RD 57- se Asia, Australia
04 Apr 2021 ZC2750 σ Sag 2.1m RD 57- w Europe, w Africa
18 Apr 2021 ZC1030 ε Gem 3.1m DD 34+ central Asia
19 Apr 2021 ZC1170 κ Gem 3.6m DD 45+ e Europe, ne Africa, Middle East, w Asia
22 Apr 2021 ZC1484 η Leo 3.5m DD 71+ Polynesia
24 Apr 2021 ZC1702 ν Vir 4.0m DD 88+ Caribbean, Central America, Mexico, w USA, w Canada
28 Apr 2021 ZC2302 β Sco 2.6m RD 95- s Africa, Madagascar
28 APR 2021 ZC2307 ω1 Sco 3.9m RD 95- ne Africa, Middle East, s Asia
30 Apr 2021 ZC2500 θ Oph 3.3m RD 87- Europe, n Africa







01 May 2021 ZC2750 σ Sag 2.1m RD 74+ Hawaii
01 May 2021 ZC2672 λ Sag 2.8m RD 78- e South America, sw Africa
15 May 2021 ZC1030 ε Gem 3.1m DD 14+ e Europe
17 May 2021 ZC1170 κ Gem 3.6m DD 23+ e USA, e Canada, Caribbean
19 May 2021 ZC1484 η Leo 3.5m DD 49+ ne Africa, Middle East, sw Asia
21 May 2021 ZC1651 ι Leo 3.9m DD 65+ New Zealand
21 May 2021 ZC1702 ν Vir 4.0m DD 70+ s central & se Asia
27 May 2021 ZC2500 θ Oph 3.3m RD 98- Hawaii
28 May 2021 ZC2750 σ Sag 2.1m RD 91- n Africa, Middle East, s Europe
28 May 2021 ZC2672 λ Sag 2.8m rD 94- se Asia, Australia, New Zealand







16 Jun 2021 ZC1484 η Leo 3.5m DD 27+ Caribbean, n South America
17 Jun 2021 ZC1702 ν Vir 4.0m DD 48+ w Africa
22 Jun 2021 ZC2302 β Sco 2.6m DD 94+ se Africa, s Madagascar
22 Jun 2021 ZC2307 ω1 Sco 3.9m DD 94+ w central Africa, s Middle East, s Asia







13 Jul 2021 ZC1484 η Leo 3.5m DD 10+ Polynesia
15 Jul 2021 ZC1702 ν Vir 4.0m DD 26+ Hawaii
20 Jul 2021 ZC2302 β Sco 2.6m DD 79+ s South America
20 Jul 2021 ZC2307 ω 1 Sco 3.9m DD 79+ n South America
21 Jul 2021 ZC2500 θ Oph 3.3m DD 90+ Hawaii
22 Jul 2021 ZC2750 σ Sag 2.1m DD 98+ ne Africa, Middle East, s Asia
22 Jul 2021 ZC2672 λ Sag 2.8m DD 96+ New Zealand, Polynesia







05 Aug 2021 ZC1030 ε Gem 3.1m RD 08- ne Asia
11 Aug 2021 ZC1702 ν Vir 4.0m DD 09+ se Asia
16 Aug 2021 ZC2307 ω1 Sco 3.9m DD 59+ e Australia, Polynesia
17 Aug 2021 ZC2500 θ Oph 3.3m DD 72+ s Asia
18 Aug 2021 ZC2672 λ Sag 2.8m DD 83+ se Africa
19 Aug 2021 ZC2750 σ Sag 2.1m DD 86+ s USA, Mexico, Central America, nw So America, Caribbean







01 Sep 2021 ZC1030 ε Gem 3.1m RD 25- Europe
03 Sep 2021 ZC1170 κ Gem 3.6m RD 16- w Europe
12 Sep 2021 ZC2307 ω1 Sco 3.9m DD 36+ s Madagascar
13 Sep 2021 ZC2500 θ Oph 3.3m DD 50+ e South America, w Africa
14 Sep 2021 ZC2672 λ Sag 2.8m DD 62+ s South America
15 Sep 2021 ZC2750 σ Sag 2.1m DD 67+ se Asia, Polynesia
15 Sep 2021 ZC2721 φ Sag 3.2m DD 65+ nw USA







03 Oct 2021 ZC1484 η Leo 3.5m RD 13- w Europe, nw Africa
09 Oct 2021 ZC2307 ω1 Sco 3.9m DD 16+ se South America
11 Oct 2021 ZC2500 θ Oph 3.3m DD 28+ French Polynesia
12 Oct 2021 ZC2750 σ Sag 2.1m DD 44+ Madagascar
12 Oct 2021 ZC2721 φ Sag 3.2m DD 42+ se Asia
30 Oct 2021 ZC1484 η Leo 3.5m RD 32- nw Canada, Alaska







01 Nov 2021 ZC1702 ν Vir 4.0m RD 15- w USA, w Canada
07 Nov 2021 ZC2500 θ Oph 3.3m DD 10+ se Asia
08 Nov 2021 ZC2750 σ Sag 2.1m DD 22+ e central South America
08 Nov 2021 ZC2721 φ Sag 3.2m DD 21+ nw Africa, w Europe
26 Nov 2021 ZC1484 η Leo 3.5m RD 56- w Europe, central Asia
28 Nov 2021 ZC1702 ν Vir 4.0m RD 35- central Asia







24 Dec 2021 ZC1484 η Leo 3.5m RD 78- e USA, e Canada, w Europe, nw Africa
29 Dec 2021 ZC2118 α Lib 2.8m RD 20- ne Asia
31 Dec 2021 ZC2307 ω1 Sco 3.9m RD 09- sw Africa


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