C/2010 E5 (Scotti)
| Parameter |
Value |
| Designation |
C/2010 E5 (Scotti) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-11-21T10:42:02.502720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:41Z |
| Obs used |
121 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
17.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-04-02.0000000 |
| e |
0.84273939 |
| q (au) |
3.888445 |
| a (au) |
24.726120 |
| i (deg) |
18.910164 |
| Ω (om, deg) |
17.083811 |
| ω (w, deg) |
147.858249 |
| M (ma, deg) |
1.054568 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.476 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.476 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.727 |
| k |
0.800 |
| 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) |
| 2026-02-03 00:00 |
21:37:43.07 |
-31:06:17.0 |
HIP 106747 |
20.95 |
| 2026-02-03 12:00 |
21:37:48.25 |
-31:05:51.3 |
HIP 106747 |
20.77 |
| 2026-02-04 00:00 |
21:37:53.43 |
-31:05:25.7 |
HIP 106747 |
20.66 |
| 2026-02-04 12:00 |
21:37:58.61 |
-31:05:00.3 |
HIP 106747 |
20.61 |
| 2026-02-05 00:00 |
21:38:03.80 |
-31:04:35.0 |
HIP 106747 |
20.64 |
| 2026-02-05 12:00 |
21:38:08.99 |
-31:04:09.8 |
HIP 106747 |
20.74 |
| 2026-02-06 00:00 |
21:38:14.19 |
-31:03:44.8 |
HIP 106747 |
20.91 |
| 2026-02-06 12:00 |
21:38:19.39 |
-31:03:19.9 |
HIP 106747 |
21.15 |
| 2026-02-07 00:00 |
21:38:24.59 |
-31:02:55.1 |
HIP 106747 |
21.46 |
| 2026-02-07 12:00 |
21:38:29.79 |
-31:02:30.5 |
HIP 106747 |
21.82 |
| 2026-02-08 00:00 |
21:38:35.00 |
-31:02:06.0 |
HIP 106747 |
22.25 |
| 2026-02-08 12:00 |
21:38:40.20 |
-31:01:41.6 |
HIP 106747 |
22.73 |
| 2026-02-09 00:00 |
21:38:45.41 |
-31:01:17.4 |
HIP 106747 |
23.26 |
| 2026-02-09 12:00 |
21:38:50.62 |
-31:00:53.4 |
HIP 106747 |
23.85 |
| 2026-02-10 00:00 |
21:38:55.83 |
-31:00:29.5 |
HIP 107047 |
24.24 |
| 2026-02-10 12:00 |
21:39:01.04 |
-31:00:05.7 |
HIP 107047 |
23.16 |
| 2026-02-11 00:00 |
21:39:06.24 |
-30:59:42.1 |
HIP 107047 |
22.09 |
| 2026-02-11 12:00 |
21:39:11.45 |
-30:59:18.6 |
HIP 107047 |
21.03 |
| 2026-02-12 00:00 |
21:39:16.66 |
-30:58:55.3 |
HIP 107047 |
19.99 |
| 2026-02-12 12:00 |
21:39:21.87 |
-30:58:32.2 |
HIP 107047 |
18.96 |
| 2026-02-13 00:00 |
21:39:27.07 |
-30:58:09.2 |
HIP 107047 |
17.95 |
| 2026-02-13 12:00 |
21:39:32.28 |
-30:57:46.3 |
HIP 107047 |
16.96 |
| 2026-02-14 00:00 |
21:39:37.48 |
-30:57:23.6 |
HIP 107047 |
16.00 |
| 2026-02-14 12:00 |
21:39:42.68 |
-30:57:01.1 |
HIP 107047 |
15.06 |
| 2026-02-15 00:00 |
21:39:47.87 |
-30:56:38.7 |
HIP 107047 |
14.17 |
| 2026-02-15 12:00 |
21:39:53.07 |
-30:56:16.5 |
HIP 107047 |
13.31 |
| 2026-02-16 00:00 |
21:39:58.26 |
-30:55:54.5 |
HIP 107047 |
12.50 |
| 2026-02-16 12:00 |
21:40:03.44 |
-30:55:32.6 |
HIP 107047 |
11.76 |
| 2026-02-17 00:00 |
21:40:08.63 |
-30:55:10.9 |
HIP 107047 |
11.09 |
| 2026-02-17 12:00 |
21:40:13.81 |
-30:54:49.3 |
HIP 107047 |
10.50 |
| 2026-02-18 00:00 |
21:40:18.98 |
-30:54:28.0 |
HIP 107047 |
10.02 |
| 2026-02-18 12:00 |
21:40:24.15 |
-30:54:06.8 |
HIP 107047 |
9.65 |
| 2026-02-19 00:00 |
21:40:29.31 |
-30:53:45.7 |
HIP 107047 |
9.40 |
| 2026-02-19 12:00 |
21:40:34.47 |
-30:53:24.9 |
HIP 107047 |
9.30 |
| 2026-02-20 00:00 |
21:40:39.62 |
-30:53:04.2 |
HIP 107047 |
9.34 |
| 2026-02-20 12:00 |
21:40:44.76 |
-30:52:43.7 |
HIP 107047 |
9.51 |
| 2026-02-21 00:00 |
21:40:49.90 |
-30:52:23.4 |
HIP 107047 |
9.82 |
| 2026-02-21 12:00 |
21:40:55.03 |
-30:52:03.2 |
HIP 107047 |
10.24 |
| 2026-02-22 00:00 |
21:41:00.15 |
-30:51:43.2 |
HIP 107047 |
10.77 |
| 2026-02-22 12:00 |
21:41:05.27 |
-30:51:23.4 |
HIP 107047 |
11.38 |
| 2026-02-23 00:00 |
21:41:10.38 |
-30:51:03.8 |
HIP 107047 |
12.07 |
| 2026-02-23 12:00 |
21:41:15.47 |
-30:50:44.4 |
HIP 107047 |
12.82 |
| 2026-02-24 00:00 |
21:41:20.56 |
-30:50:25.2 |
HIP 107047 |
13.62 |