HIP 88905 — Variable Star in Sagittarius
Excellent (65/100)
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1Physical Properties
Magnitude
6.61
Variable Type
Eclipsing Binary (Beta Lyrae-type)
Spectral Type
B3III
giant
Star Color
White
(B-V 0.02)
2Position & Identifiers
RA
18h 08m 54.1s
Dec
-25° 28' 21.0"
Constellation
Sagittarius
(Sgr)
HR
6773
HIP
88905
HD
165814
SAO
186350
Querying VizieR catalog...
3How easy to follow?
Magnitude
6.4 – 6.9 mag
Amplitude
0.5 mag
Period
2.25 d
Type
EB
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | V. hard | Imp. | Imp. |
| 50 mm finder 50mm finder | Hard+ | Hard+ | Hard+ |
| 150 mm telescope 150mm scope | Hard+ | Hard+ | Hard+ |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
Out of reach for typical amateur telescopes, even at Bortle 3.
4Visibility
Set a location in User Settings to see visibility data.
Best season
May – Jul
(peak: Jun)
5Survey Image
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6Comparison Stars for HIP 88905 (6.4–6.9)
Nearby stable stars for estimating brightness (AAVSO)
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7
Size Comparison
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8
Compare Stars
9
Spectral Classification
10
Hertzsprung-Russell Diagram
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11
Stellar Lifecycle
12
Blackbody Spectrum
13
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
14
Stellar Fusion
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15Stellar Notes
EB 6.43 - 6.88V, 2.24815d. Mass transfer indicated. The var. is probably the 8.85V companion of the visual double. GCVS | gives combined light.
Visual companion is blue.
2.2481d, K 151k/s, V0 -6k/s, msin3i 6.42, asini 4.66. Mean mass components 5.5 solar.
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.
NGC 6553
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 8.3
0.4°
Sagittarius
NGC 6530
Rich open cluster
Open Cluster
mag 4.6
1.5°
Sagittarius
9 Sgr
Hot blue O-type star
Star
mag 5.97
1.6°
Sagittarius
M8
NGC 6523
Emission nebula — try an OIII filter
Emission Nebula
mag 5.8
1.6°
Sagittarius
Gamma Sgr
HIP 88567; Gamma1 Sagittarii
Pulsating variable, period 7.6d
Variable Star
mag 4.69
4.2°
Sagittarius
3 Sgr
Pulsating variable, period 7.0d
Variable Star
mag 4.54
5.3°
Sagittarius
Y Sgr
Pulsating variable, period 5.8d
Variable Star
mag 5.75
7.2°
Sagittarius
U Sgr
Pulsating variable, period 6.7d
Variable Star
mag 6.68
8.3°
Sagittarius
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