V3879 Sagittarii — Variable Star in Sagittarius
Good (57/100)
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1Physical Properties
Magnitude
6.35
Range
6.05 - 6.58
Period
50 days
Variable Type
Semi-Regular Variable (Late-type Giant)
Spectral Type
M4III
giant
Star Color
Red
(B-V 1.75)
2Position & Identifiers
RA
18h 42m 55.2s
Dec
-19° 17' 02.0"
Constellation
Sagittarius
(Sgr)
HR
7023
HIP
91781
HD
172816
SAO
161754
Variable ID
V3879 Sgr
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3How easy to follow?
Magnitude
6.1 – 6.6 mag
Amplitude
0.5 mag
Period
50 d
Type
SRB
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | V. hard | V. hard | Imp. |
| 50 mm finder 50mm finder | Medium | Hard+ | Hard+ |
| 150 mm telescope 150mm scope | Medium | Medium | Medium |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
Best season
May – Jul
(peak: Jun)
5Survey Image
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6Light Curve
7Comparison Stars for V3879 Sgr (6.0–6.6)
Nearby stable stars for estimating brightness (AAVSO)
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8
Size Comparison
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9
Compare Stars
10
Spectral Classification
11
Hertzsprung-Russell Diagram
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12
Stellar Lifecycle
13
Blackbody Spectrum
14
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
15
Stellar Fusion
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16Stellar Notes
SRb 6.05 - 6.58p, about 50d.
Occultation double.
Occultation diam., two determinations, 0.0085" and 0.0101".
Nearby in the Sky
Other targets within a few degrees — pan your scope a little and keep exploring.
Visibility scores assume a 150 mm Newton at Bortle 4.
Collinder 394
Open cluster
Open Cluster
mag 6.3
2.4°
Sagittarius
U Sgr
Pulsating variable, period 6.7d
Variable Star
mag 6.68
2.6°
Sagittarius
IC 4715 C
Noteworthy asterism
Asterism
mag 4.50
4.0°
Sagittarius
Y Sgr
Pulsating variable, period 5.8d
Variable Star
mag 5.75
5.1°
Sagittarius
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