| 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) |
| 2026-07-29 00:00 |
21:44:38.60 |
-31:44:02.1 |
HIP 107399 |
8.87 |
| 2026-07-29 12:00 |
21:44:34.35 |
-31:44:24.9 |
HIP 107399 |
9.84 |
| 2026-07-30 00:00 |
21:44:30.08 |
-31:44:47.6 |
HIP 107399 |
10.81 |
| 2026-07-30 12:00 |
21:44:25.81 |
-31:45:10.2 |
HIP 107399 |
11.78 |
| 2026-07-31 00:00 |
21:44:21.52 |
-31:45:32.7 |
HIP 107399 |
12.76 |
| 2026-07-31 12:00 |
21:44:17.22 |
-31:45:55.0 |
HIP 107399 |
13.73 |
| 2026-08-01 00:00 |
21:44:12.91 |
-31:46:17.2 |
HIP 107399 |
14.72 |
| 2026-08-01 12:00 |
21:44:08.58 |
-31:46:39.3 |
HIP 107399 |
15.70 |
| 2026-08-02 00:00 |
21:44:04.25 |
-31:47:01.2 |
HIP 107399 |
16.68 |
| 2026-08-02 12:00 |
21:43:59.90 |
-31:47:23.0 |
HIP 107399 |
17.67 |
| 2026-08-03 00:00 |
21:43:55.54 |
-31:47:44.7 |
HIP 107399 |
18.66 |
| 2026-08-03 12:00 |
21:43:51.18 |
-31:48:06.2 |
HIP 107399 |
19.65 |
| 2026-08-04 00:00 |
21:43:46.80 |
-31:48:27.6 |
HIP 107399 |
20.64 |
| 2026-08-04 12:00 |
21:43:42.41 |
-31:48:48.9 |
HIP 107399 |
21.63 |
| 2026-08-05 00:00 |
21:43:38.02 |
-31:49:10.0 |
HIP 107399 |
22.62 |
| 2026-08-05 12:00 |
21:43:33.61 |
-31:49:30.9 |
HIP 107399 |
23.62 |
| 2026-08-06 00:00 |
21:43:29.20 |
-31:49:51.7 |
HIP 107399 |
24.61 |
| 2026-08-06 12:00 |
21:43:24.78 |
-31:50:12.4 |
HIP 107399 |
25.61 |
| 2026-08-07 00:00 |
21:43:20.35 |
-31:50:32.9 |
HIP 107399 |
26.60 |
| 2026-08-07 12:00 |
21:43:15.92 |
-31:50:53.2 |
HIP 107399 |
27.60 |
| 2026-08-08 00:00 |
21:43:11.47 |
-31:51:13.4 |
HIP 107058 |
28.34 |
| 2026-08-08 12:00 |
21:43:07.02 |
-31:51:33.4 |
HIP 107058 |
27.36 |
| 2026-08-09 00:00 |
21:43:02.57 |
-31:51:53.3 |
HIP 107058 |
26.38 |
| 2026-08-09 12:00 |
21:42:58.11 |
-31:52:13.0 |
HIP 107058 |
25.40 |
| 2026-08-10 00:00 |
21:42:53.64 |
-31:52:32.5 |
HIP 107058 |
24.41 |
| 2026-08-10 12:00 |
21:42:49.17 |
-31:52:51.9 |
HIP 107058 |
23.43 |
| 2026-08-11 00:00 |
21:42:44.69 |
-31:53:11.1 |
HIP 107058 |
22.46 |
| 2026-08-11 12:00 |
21:42:40.22 |
-31:53:30.1 |
HIP 107058 |
21.48 |
| 2026-08-12 00:00 |
21:42:35.73 |
-31:53:49.0 |
HIP 107058 |
20.50 |
| 2026-08-12 12:00 |
21:42:31.25 |
-31:54:07.7 |
HIP 107058 |
19.53 |
| 2026-08-13 00:00 |
21:42:26.76 |
-31:54:26.2 |
HIP 107058 |
18.56 |
| 2026-08-13 12:00 |
21:42:22.26 |
-31:54:44.5 |
HIP 107058 |
17.60 |
| 2026-08-14 00:00 |
21:42:17.77 |
-31:55:02.7 |
HIP 107058 |
16.63 |
| 2026-08-14 12:00 |
21:42:13.28 |
-31:55:20.6 |
HIP 107058 |
15.68 |
| 2026-08-15 00:00 |
21:42:08.78 |
-31:55:38.4 |
HIP 107058 |
14.72 |
| 2026-08-15 12:00 |
21:42:04.28 |
-31:55:56.0 |
HIP 107058 |
13.78 |
| 2026-08-16 00:00 |
21:41:59.79 |
-31:56:13.4 |
HIP 107058 |
12.84 |
| 2026-08-16 12:00 |
21:41:55.29 |
-31:56:30.6 |
HIP 107058 |
11.91 |
| 2026-08-17 00:00 |
21:41:50.79 |
-31:56:47.7 |
HIP 107058 |
11.00 |
| 2026-08-17 12:00 |
21:41:46.30 |
-31:57:04.5 |
HIP 107058 |
10.09 |
| 2026-08-18 00:00 |
21:41:41.80 |
-31:57:21.1 |
HIP 107058 |
9.21 |
| 2026-08-18 12:00 |
21:41:37.31 |
-31:57:37.6 |
HIP 107058 |
8.35 |
| 2026-08-19 00:00 |
21:41:32.82 |
-31:57:53.8 |
HIP 107058 |
7.52 |