| Parameter |
Value |
| Designation |
P/2005 E1 (Tubbiolo) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2005-03-18T05:50:12.549120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:46Z |
| Obs used |
61 |
| NEO |
- |
| M1 |
10.700 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2005-03-26.0000000 |
| e |
0.38473927 |
| q (au) |
4.445458 |
| a (au) |
7.225324 |
| i (deg) |
5.153002 |
| Ω (om, deg) |
4.415914 |
| ω (w, deg) |
170.792047 |
| M (ma, deg) |
0.393641 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.903 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.903 |
| n |
2.000 |
| gf |
0.990 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.758 |
| 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) |
| 2026-09-20 00:00 |
17:23:50.31 |
-27:02:58.7 |
HIP 85189 |
12.43 |
| 2026-09-20 12:00 |
17:24:00.47 |
-27:02:47.0 |
HIP 85189 |
10.57 |
| 2026-09-21 00:00 |
17:24:10.77 |
-27:02:35.4 |
HIP 85189 |
8.90 |
| 2026-09-21 12:00 |
17:24:21.22 |
-27:02:23.9 |
HIP 85189 |
7.55 |
| 2026-09-22 00:00 |
17:24:31.80 |
-27:02:12.6 |
HIP 85189 |
6.76 |
| 2026-09-22 12:00 |
17:24:42.52 |
-27:02:01.4 |
HIP 85189 |
6.76 |
| 2026-09-23 00:00 |
17:24:53.38 |
-27:01:50.4 |
HIP 85189 |
7.58 |
| 2026-09-23 12:00 |
17:25:04.37 |
-27:01:39.5 |
HIP 85292 |
8.99 |
| 2026-09-24 00:00 |
17:25:15.50 |
-27:01:28.8 |
HIP 85292 |
6.55 |
| 2026-09-24 12:00 |
17:25:26.77 |
-27:01:18.1 |
HIP 85292 |
4.15 |
| 2026-09-25 00:00 |
17:25:38.18 |
-27:01:07.6 |
HIP 85292 |
2.03 |
| 2026-09-25 12:00 |
17:25:49.71 |
-27:00:57.3 |
HIP 85292 |
2.02 |
| 2026-09-26 00:00 |
17:26:01.39 |
-27:00:47.0 |
HIP 85292 |
4.19 |
| 2026-09-26 12:00 |
17:26:13.19 |
-27:00:36.9 |
HIP 85292 |
6.70 |
| 2026-09-27 00:00 |
17:26:25.13 |
-27:00:26.9 |
HIP 85292 |
9.32 |
| 2026-09-27 12:00 |
17:26:37.19 |
-27:00:17.0 |
HIP 85292 |
11.98 |
| 2026-09-28 00:00 |
17:26:49.39 |
-27:00:07.3 |
HIP 85292 |
14.69 |
| 2026-09-28 12:00 |
17:27:01.72 |
-26:59:57.6 |
HIP 85292 |
17.43 |
| 2026-09-29 00:00 |
17:27:14.18 |
-26:59:48.1 |
HIP 85292 |
20.20 |
| 2026-09-29 12:00 |
17:27:26.77 |
-26:59:38.7 |
HIP 85292 |
23.00 |
| 2026-09-30 00:00 |
17:27:39.49 |
-26:59:29.4 |
HIP 85538 |
22.22 |
| 2026-09-30 12:00 |
17:27:52.33 |
-26:59:20.2 |
HIP 85538 |
20.18 |
| 2026-10-01 00:00 |
17:28:05.30 |
-26:59:11.2 |
HIP 85538 |
18.35 |
| 2026-10-01 12:00 |
17:28:18.40 |
-26:59:02.2 |
HIP 85538 |
16.80 |
| 2026-10-02 00:00 |
17:28:31.62 |
-26:58:53.3 |
HIP 85538 |
15.66 |
| 2026-10-02 12:00 |
17:28:44.97 |
-26:58:44.6 |
HIP 85538 |
15.01 |
| 2026-10-03 00:00 |
17:28:58.44 |
-26:58:35.9 |
HIP 85538 |
14.94 |
| 2026-10-03 12:00 |
17:29:12.04 |
-26:58:27.3 |
HIP 85538 |
15.49 |
| 2026-10-04 00:00 |
17:29:25.75 |
-26:58:18.9 |
HIP 85538 |
16.59 |
| 2026-10-04 12:00 |
17:29:39.60 |
-26:58:10.5 |
HIP 85538 |
18.17 |
| 2026-10-05 00:00 |
17:29:53.56 |
-26:58:02.2 |
HIP 85681 |
16.74 |
| 2026-10-05 12:00 |
17:30:07.65 |
-26:57:54.0 |
HIP 85681 |
15.42 |
| 2026-10-06 00:00 |
17:30:21.85 |
-26:57:45.9 |
HIP 85681 |
14.67 |
| 2026-10-06 12:00 |
17:30:36.18 |
-26:57:37.9 |
HIP 85681 |
14.58 |
| 2026-10-07 00:00 |
17:30:50.62 |
-26:57:30.0 |
HIP 85681 |
15.17 |
| 2026-10-07 12:00 |
17:31:05.19 |
-26:57:22.2 |
HIP 85681 |
16.41 |
| 2026-10-08 00:00 |
17:31:19.87 |
-26:57:14.4 |
HIP 85681 |
18.15 |
| 2026-10-08 12:00 |
17:31:34.67 |
-26:57:06.7 |
HIP 85681 |
20.30 |
| 2026-10-09 00:00 |
17:31:49.58 |
-26:56:59.1 |
HIP 85681 |
22.74 |
| 2026-10-09 12:00 |
17:32:04.62 |
-26:56:51.5 |
HIP 85681 |
25.40 |
| 2026-10-10 00:00 |
17:32:19.76 |
-26:56:44.1 |
HIP 85681 |
28.23 |
| 2026-10-10 12:00 |
17:32:35.02 |
-26:56:36.7 |
HIP 85681 |
31.19 |
| 2026-10-11 00:00 |
17:32:50.39 |
-26:56:29.3 |
HIP 86020 |
28.55 |