C/2008 S3 (Boattini)

Metadata

Parameter Value
Designation C/2008 S3 (Boattini)
Type C
Perihelion (tp_cal, UTC) 2011-06-07T00:27:12.735360Z
Orbit solution date (soln_date, UTC) 2021-04-15T23:31:23Z
Obs used 1909
NEO -
M1 8.300
K1 6.000
PC -
Osculating Elements
Parameter Value
Epoch (epoch_cal, TDB) 2011-04-19.0000000
e 1.00107749
q (au) 8.017919
a (au) -7441.315951
i (deg) 162.702798
Ω (om, deg) 54.938054
ω (w, deg) 39.937767
M (ma, deg) -0.000075

Magnitude

C/2008 S3 (Boattini) · Magnitude (Full range)

Scatter + Global Linear

$$ M_a = (5.795 + 3.046\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

Model Parameters

Parameter Value
H0 5.795
n 3.046
gf 1.000
gb -0.935
k 1.000
δ90 10.000
Parameter Symbol Range Description
Absolute magnitude at 1 AU from Sun and Earth H0 -5 to 20 Intrinsic brightness of the comet
Photometric slope parameter n 2 to 6 Rate of brightness change with heliocentric distance
Forward scattering asymmetry factor gf 0.8 to 1 Degree of forward scattering
Backward scattering asymmetry factor gb -1 to -0.5 Degree of backward scattering
Partitioning coefficient k 0.8 to 1 Ratio between forward/backward scattering contributions
Dust-to-gas brightness ratio δ90 1 to 10 Relative contribution of dust scattering to gas emission

Reference: EPSC-DPS2025-160

Ephemeris

Date/Time (UTC) RA (J2000) Dec (J2000) Nearest HIP Dist from HIP (arcmin)
2026-07-29 00:00 17:04:07.79 -15:40:48.6 HIP 83479 13.02
2026-07-29 12:00 17:04:04.38 -15:40:52.3 HIP 83479 12.56
2026-07-30 00:00 17:04:00.99 -15:40:56.0 HIP 83479 12.14
2026-07-30 12:00 17:03:57.63 -15:40:59.8 HIP 83479 11.77
2026-07-31 00:00 17:03:54.31 -15:41:03.7 HIP 83479 11.44
2026-07-31 12:00 17:03:51.01 -15:41:07.7 HIP 83479 11.16
2026-08-01 00:00 17:03:47.74 -15:41:11.7 HIP 83479 10.93
2026-08-01 12:00 17:03:44.51 -15:41:15.8 HIP 83479 10.76
2026-08-02 00:00 17:03:41.30 -15:41:20.0 HIP 83479 10.63
2026-08-02 12:00 17:03:38.13 -15:41:24.3 HIP 83479 10.57
2026-08-03 00:00 17:03:34.98 -15:41:28.6 HIP 83479 10.55
2026-08-03 12:00 17:03:31.87 -15:41:33.1 HIP 83479 10.59
2026-08-04 00:00 17:03:28.79 -15:41:37.5 HIP 83479 10.68
2026-08-04 12:00 17:03:25.74 -15:41:42.1 HIP 83479 10.81
2026-08-05 00:00 17:03:22.72 -15:41:46.7 HIP 83479 10.99
2026-08-05 12:00 17:03:19.73 -15:41:51.5 HIP 83479 11.21
2026-08-06 00:00 17:03:16.78 -15:41:56.2 HIP 83479 11.46
2026-08-06 12:00 17:03:13.86 -15:42:01.1 HIP 83479 11.75
2026-08-07 00:00 17:03:10.97 -15:42:06.0 HIP 83479 12.07
2026-08-07 12:00 17:03:08.11 -15:42:11.1 HIP 83479 12.41
2026-08-08 00:00 17:03:05.28 -15:42:16.1 HIP 83479 12.78
2026-08-08 12:00 17:03:02.49 -15:42:21.3 HIP 83479 13.16
2026-08-09 00:00 17:02:59.73 -15:42:26.5 HIP 83479 13.56
2026-08-09 12:00 17:02:57.00 -15:42:31.8 HIP 83479 13.98
2026-08-10 00:00 17:02:54.31 -15:42:37.2 HIP 83479 14.41
2026-08-10 12:00 17:02:51.65 -15:42:42.6 HIP 83479 14.84
2026-08-11 00:00 17:02:49.02 -15:42:48.1 HIP 83479 15.29
2026-08-11 12:00 17:02:46.43 -15:42:53.7 HIP 83479 15.74
2026-08-12 00:00 17:02:43.87 -15:42:59.4 HIP 83479 16.19
2026-08-12 12:00 17:02:41.35 -15:43:05.1 HIP 83479 16.65
2026-08-13 00:00 17:02:38.86 -15:43:10.9 HIP 83479 17.11
2026-08-13 12:00 17:02:36.40 -15:43:16.8 HIP 83479 17.57
2026-08-14 00:00 17:02:33.98 -15:43:22.7 HIP 83479 18.03
2026-08-14 12:00 17:02:31.59 -15:43:28.8 HIP 83479 18.49
2026-08-15 00:00 17:02:29.24 -15:43:34.8 HIP 83479 18.95
2026-08-15 12:00 17:02:26.92 -15:43:41.0 HIP 83479 19.41
2026-08-16 00:00 17:02:24.64 -15:43:47.2 HIP 83479 19.86
2026-08-16 12:00 17:02:22.39 -15:43:53.5 HIP 83479 20.32
2026-08-17 00:00 17:02:20.18 -15:43:59.8 HIP 83479 20.76
2026-08-17 12:00 17:02:18.00 -15:44:06.2 HIP 83479 21.21
2026-08-18 00:00 17:02:15.86 -15:44:12.7 HIP 83479 21.65
2026-08-18 12:00 17:02:13.75 -15:44:19.3 HIP 83242 21.35
2026-08-19 00:00 17:02:11.68 -15:44:25.9 HIP 83242 20.88