C/2011 Y3 (Boattini)

Metadata

Parameter Value
Designation C/2011 Y3 (Boattini)
Type C
Perihelion (tp_cal, UTC) 2011-08-22T22:31:41.001600Z
Orbit solution date (soln_date, UTC) 2021-04-15T23:31:59Z
Obs used 54
NEO -
M1 11.700
K1 10.000
PC 0.030
Osculating Elements
Parameter Value
Epoch (epoch_cal, TDB) 2012-01-01.0000000
e 0.70491483
q (au) 3.497843
a (au) 11.853673
i (deg) 26.516854
Ω (om, deg) 84.802605
ω (w, deg) 340.679907
M (ma, deg) 3.165186

Magnitude

C/2011 Y3 (Boattini) · Magnitude (Full range)

Scatter + Global Linear

$$ M_a = (14.131 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

Model Parameters

Parameter Value
H0 14.131
n 2.000
gf 1.000
gb -0.952
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)
2026-03-26 00:00 15:55:39.91 -05:52:53.5 HIP 77864 27.02
2026-03-26 12:00 15:55:37.07 -05:52:29.8 HIP 77864 26.22
2026-03-27 00:00 15:55:34.19 -05:52:06.2 HIP 77864 25.42
2026-03-27 12:00 15:55:31.26 -05:51:42.5 HIP 77864 24.60
2026-03-28 00:00 15:55:28.28 -05:51:18.8 HIP 77864 23.77
2026-03-28 12:00 15:55:25.26 -05:50:55.0 HIP 77864 22.93
2026-03-29 00:00 15:55:22.19 -05:50:31.3 HIP 77864 22.09
2026-03-29 12:00 15:55:19.08 -05:50:07.5 HIP 77864 21.23
2026-03-30 00:00 15:55:15.92 -05:49:43.7 HIP 77864 20.36
2026-03-30 12:00 15:55:12.71 -05:49:19.8 HIP 77864 19.49
2026-03-31 00:00 15:55:09.47 -05:48:56.0 HIP 77864 18.60
2026-03-31 12:00 15:55:06.17 -05:48:32.1 HIP 77864 17.71
2026-04-01 00:00 15:55:02.84 -05:48:08.3 HIP 77864 16.80
2026-04-01 12:00 15:54:59.46 -05:47:44.4 HIP 77864 15.89
2026-04-02 00:00 15:54:56.03 -05:47:20.5 HIP 77864 14.97
2026-04-02 12:00 15:54:52.56 -05:46:56.6 HIP 77864 14.04
2026-04-03 00:00 15:54:49.05 -05:46:32.7 HIP 77864 13.10
2026-04-03 12:00 15:54:45.50 -05:46:08.8 HIP 77864 12.16
2026-04-04 00:00 15:54:41.91 -05:45:44.9 HIP 77864 11.21
2026-04-04 12:00 15:54:38.27 -05:45:21.1 HIP 77864 10.25
2026-04-05 00:00 15:54:34.59 -05:44:57.2 HIP 77864 9.30
2026-04-05 12:00 15:54:30.87 -05:44:33.3 HIP 77864 8.34
2026-04-06 00:00 15:54:27.11 -05:44:09.5 HIP 77864 7.38
2026-04-06 12:00 15:54:23.30 -05:43:45.6 HIP 77864 6.43
2026-04-07 00:00 15:54:19.46 -05:43:21.8 HIP 77864 5.50
2026-04-07 12:00 15:54:15.58 -05:42:58.0 HIP 77864 4.61
2026-04-08 00:00 15:54:11.65 -05:42:34.2 HIP 77864 3.78
2026-04-08 12:00 15:54:07.69 -05:42:10.5 HIP 77864 3.08
2026-04-09 00:00 15:54:03.69 -05:41:46.7 HIP 77864 2.64
2026-04-09 12:00 15:53:59.65 -05:41:23.0 HIP 77864 2.59
2026-04-10 00:00 15:53:55.57 -05:40:59.4 HIP 77864 2.96
2026-04-10 12:00 15:53:51.45 -05:40:35.7 HIP 77864 3.64
2026-04-11 00:00 15:53:47.30 -05:40:12.1 HIP 77864 4.49
2026-04-11 12:00 15:53:43.10 -05:39:48.6 HIP 77864 5.44
2026-04-12 00:00 15:53:38.87 -05:39:25.0 HIP 77864 6.45
2026-04-12 12:00 15:53:34.61 -05:39:01.6 HIP 77864 7.50
2026-04-13 00:00 15:53:30.31 -05:38:38.1 HIP 77864 8.57
2026-04-13 12:00 15:53:25.97 -05:38:14.7 HIP 77864 9.67
2026-04-14 00:00 15:53:21.59 -05:37:51.4 HIP 77768 9.73
2026-04-14 12:00 15:53:17.18 -05:37:28.1 HIP 77768 8.88
2026-04-15 00:00 15:53:12.74 -05:37:04.9 HIP 77768 8.11
2026-04-15 12:00 15:53:08.26 -05:36:41.8 HIP 77768 7.44
2026-04-16 00:00 15:53:03.75 -05:36:18.7 HIP 77768 6.90