| Parameter |
Value |
| Designation |
C/2000 Y1 (Tubbiolo) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2001-02-02T03:45:55.477440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:08Z |
| Obs used |
94 |
| NEO |
- |
| M1 |
6.300 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2001-05-01.0000000 |
| e |
1.00234998 |
| q (au) |
7.974764 |
| a (au) |
-3393.538738 |
| i (deg) |
137.974246 |
| Ω (om, deg) |
239.394833 |
| ω (w, deg) |
181.732505 |
| M (ma, deg) |
0.000438 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.458 + 2.166\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.458 |
| n |
2.166 |
| gf |
0.980 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.924 |
| 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) |
| 2026-06-01 00:00 |
19:09:20.89 |
-54:11:32.9 |
HIP 94175 |
10.12 |
| 2026-06-01 12:00 |
19:09:16.56 |
-54:11:47.9 |
HIP 94051 |
10.22 |
| 2026-06-02 00:00 |
19:09:12.21 |
-54:12:02.8 |
HIP 94051 |
10.24 |
| 2026-06-02 12:00 |
19:09:07.84 |
-54:12:17.5 |
HIP 94051 |
10.30 |
| 2026-06-03 00:00 |
19:09:03.43 |
-54:12:32.1 |
HIP 94051 |
10.41 |
| 2026-06-03 12:00 |
19:08:59.01 |
-54:12:46.5 |
HIP 94051 |
10.56 |
| 2026-06-04 00:00 |
19:08:54.56 |
-54:13:00.8 |
HIP 94051 |
10.74 |
| 2026-06-04 12:00 |
19:08:50.09 |
-54:13:14.9 |
HIP 94051 |
10.97 |
| 2026-06-05 00:00 |
19:08:45.60 |
-54:13:28.9 |
HIP 94051 |
11.23 |
| 2026-06-05 12:00 |
19:08:41.08 |
-54:13:42.8 |
HIP 94051 |
11.52 |
| 2026-06-06 00:00 |
19:08:36.54 |
-54:13:56.4 |
HIP 94051 |
11.85 |
| 2026-06-06 12:00 |
19:08:31.98 |
-54:14:10.0 |
HIP 94051 |
12.21 |
| 2026-06-07 00:00 |
19:08:27.40 |
-54:14:23.4 |
HIP 94051 |
12.60 |
| 2026-06-07 12:00 |
19:08:22.79 |
-54:14:36.6 |
HIP 94051 |
13.01 |
| 2026-06-08 00:00 |
19:08:18.16 |
-54:14:49.6 |
HIP 94051 |
13.44 |
| 2026-06-08 12:00 |
19:08:13.52 |
-54:15:02.6 |
HIP 94051 |
13.90 |
| 2026-06-09 00:00 |
19:08:08.85 |
-54:15:15.3 |
HIP 94051 |
14.37 |
| 2026-06-09 12:00 |
19:08:04.16 |
-54:15:27.9 |
HIP 94051 |
14.87 |
| 2026-06-10 00:00 |
19:07:59.45 |
-54:15:40.3 |
HIP 94051 |
15.38 |
| 2026-06-10 12:00 |
19:07:54.72 |
-54:15:52.6 |
HIP 94051 |
15.91 |
| 2026-06-11 00:00 |
19:07:49.97 |
-54:16:04.7 |
HIP 94051 |
16.45 |
| 2026-06-11 12:00 |
19:07:45.21 |
-54:16:16.6 |
HIP 94051 |
17.00 |
| 2026-06-12 00:00 |
19:07:40.42 |
-54:16:28.4 |
HIP 94051 |
17.56 |
| 2026-06-12 12:00 |
19:07:35.62 |
-54:16:40.0 |
HIP 94051 |
18.14 |
| 2026-06-13 00:00 |
19:07:30.80 |
-54:16:51.4 |
HIP 94051 |
18.73 |
| 2026-06-13 12:00 |
19:07:25.96 |
-54:17:02.7 |
HIP 94051 |
19.32 |
| 2026-06-14 00:00 |
19:07:21.10 |
-54:17:13.8 |
HIP 94051 |
19.93 |
| 2026-06-14 12:00 |
19:07:16.23 |
-54:17:24.7 |
HIP 94051 |
20.54 |
| 2026-06-15 00:00 |
19:07:11.34 |
-54:17:35.4 |
HIP 94051 |
21.16 |
| 2026-06-15 12:00 |
19:07:06.43 |
-54:17:46.0 |
HIP 94051 |
21.78 |
| 2026-06-16 00:00 |
19:07:01.51 |
-54:17:56.4 |
HIP 93684 |
21.07 |
| 2026-06-16 12:00 |
19:06:56.57 |
-54:18:06.6 |
HIP 93684 |
20.33 |
| 2026-06-17 00:00 |
19:06:51.62 |
-54:18:16.6 |
HIP 93684 |
19.58 |
| 2026-06-17 12:00 |
19:06:46.65 |
-54:18:26.5 |
HIP 93684 |
18.84 |
| 2026-06-18 00:00 |
19:06:41.67 |
-54:18:36.2 |
HIP 93684 |
18.10 |
| 2026-06-18 12:00 |
19:06:36.68 |
-54:18:45.7 |
HIP 93684 |
17.35 |
| 2026-06-19 00:00 |
19:06:31.67 |
-54:18:55.0 |
HIP 93684 |
16.61 |
| 2026-06-19 12:00 |
19:06:26.65 |
-54:19:04.1 |
HIP 93684 |
15.86 |
| 2026-06-20 00:00 |
19:06:21.61 |
-54:19:13.1 |
HIP 93684 |
15.11 |
| 2026-06-20 12:00 |
19:06:16.57 |
-54:19:21.8 |
HIP 93684 |
14.36 |
| 2026-06-21 00:00 |
19:06:11.51 |
-54:19:30.4 |
HIP 93684 |
13.61 |
| 2026-06-21 12:00 |
19:06:06.44 |
-54:19:38.8 |
HIP 93684 |
12.86 |
| 2026-06-22 00:00 |
19:06:01.36 |
-54:19:47.0 |
HIP 93684 |
12.11 |