C/2000 S5
| Parameter |
Value |
| Designation |
C/2000 S5 |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-10-26T15:21:36Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:06Z |
| Obs used |
11 |
| NEO |
- |
| M1 |
9.900 |
| K1 |
15.250 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2000-10-10.0000000 |
| e |
1.00000000 |
| q (au) |
0.601800 |
| a (au) |
- |
| i (deg) |
53.820000 |
| Ω (om, deg) |
341.630000 |
| ω (w, deg) |
291.480000 |
| M (ma, deg) |
- |
Magnitude
Scatter + Global Linear
$$
M_a = (10.131 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.131 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.000 |
| 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 |
05:02:12.69 |
+76:42:04.3 |
HIP 23739 |
15.45 |
| 2026-02-03 12:00 |
05:02:06.99 |
+76:41:37.2 |
HIP 23739 |
15.95 |
| 2026-02-04 00:00 |
05:02:01.38 |
+76:41:10.1 |
HIP 23739 |
16.46 |
| 2026-02-04 12:00 |
05:01:55.86 |
+76:40:42.8 |
HIP 23739 |
16.97 |
| 2026-02-05 00:00 |
05:01:50.43 |
+76:40:15.5 |
HIP 23739 |
17.47 |
| 2026-02-05 12:00 |
05:01:45.08 |
+76:39:47.9 |
HIP 23739 |
17.98 |
| 2026-02-06 00:00 |
05:01:39.83 |
+76:39:20.3 |
HIP 23739 |
18.49 |
| 2026-02-06 12:00 |
05:01:34.66 |
+76:38:52.6 |
HIP 23739 |
18.99 |
| 2026-02-07 00:00 |
05:01:29.58 |
+76:38:24.7 |
HIP 23739 |
19.50 |
| 2026-02-07 12:00 |
05:01:24.59 |
+76:37:56.7 |
HIP 23739 |
20.00 |
| 2026-02-08 00:00 |
05:01:19.70 |
+76:37:28.7 |
HIP 23739 |
20.51 |
| 2026-02-08 12:00 |
05:01:14.89 |
+76:37:00.5 |
HIP 23739 |
21.01 |
| 2026-02-09 00:00 |
05:01:10.18 |
+76:36:32.2 |
HIP 23739 |
21.51 |
| 2026-02-09 12:00 |
05:01:05.55 |
+76:36:03.8 |
HIP 23739 |
22.01 |
| 2026-02-10 00:00 |
05:01:01.02 |
+76:35:35.3 |
HIP 23739 |
22.51 |
| 2026-02-10 12:00 |
05:00:56.58 |
+76:35:06.7 |
HIP 23739 |
23.01 |
| 2026-02-11 00:00 |
05:00:52.23 |
+76:34:38.0 |
HIP 23739 |
23.51 |
| 2026-02-11 12:00 |
05:00:47.97 |
+76:34:09.3 |
HIP 23739 |
24.01 |
| 2026-02-12 00:00 |
05:00:43.80 |
+76:33:40.4 |
HIP 23739 |
24.50 |
| 2026-02-12 12:00 |
05:00:39.73 |
+76:33:11.5 |
HIP 23739 |
25.00 |
| 2026-02-13 00:00 |
05:00:35.75 |
+76:32:42.4 |
HIP 23114 |
25.08 |
| 2026-02-13 12:00 |
05:00:31.86 |
+76:32:13.3 |
HIP 23114 |
24.55 |
| 2026-02-14 00:00 |
05:00:28.06 |
+76:31:44.1 |
HIP 23114 |
24.01 |
| 2026-02-14 12:00 |
05:00:24.36 |
+76:31:14.9 |
HIP 23114 |
23.48 |
| 2026-02-15 00:00 |
05:00:20.75 |
+76:30:45.5 |
HIP 23114 |
22.95 |
| 2026-02-15 12:00 |
05:00:17.24 |
+76:30:16.1 |
HIP 23114 |
22.43 |
| 2026-02-16 00:00 |
05:00:13.81 |
+76:29:46.7 |
HIP 23114 |
21.90 |
| 2026-02-16 12:00 |
05:00:10.49 |
+76:29:17.1 |
HIP 23114 |
21.37 |
| 2026-02-17 00:00 |
05:00:07.25 |
+76:28:47.5 |
HIP 23114 |
20.84 |
| 2026-02-17 12:00 |
05:00:04.11 |
+76:28:17.9 |
HIP 23114 |
20.32 |
| 2026-02-18 00:00 |
05:00:01.06 |
+76:27:48.2 |
HIP 23114 |
19.79 |
| 2026-02-18 12:00 |
04:59:58.11 |
+76:27:18.4 |
HIP 23114 |
19.26 |
| 2026-02-19 00:00 |
04:59:55.25 |
+76:26:48.6 |
HIP 23114 |
18.74 |
| 2026-02-19 12:00 |
04:59:52.48 |
+76:26:18.7 |
HIP 23114 |
18.22 |
| 2026-02-20 00:00 |
04:59:49.81 |
+76:25:48.8 |
HIP 23114 |
17.69 |
| 2026-02-20 12:00 |
04:59:47.23 |
+76:25:18.9 |
HIP 23114 |
17.17 |
| 2026-02-21 00:00 |
04:59:44.75 |
+76:24:48.9 |
HIP 23114 |
16.65 |
| 2026-02-21 12:00 |
04:59:42.36 |
+76:24:18.8 |
HIP 23114 |
16.13 |
| 2026-02-22 00:00 |
04:59:40.06 |
+76:23:48.8 |
HIP 23114 |
15.61 |
| 2026-02-22 12:00 |
04:59:37.86 |
+76:23:18.7 |
HIP 23114 |
15.10 |
| 2026-02-23 00:00 |
04:59:35.75 |
+76:22:48.5 |
HIP 23114 |
14.58 |
| 2026-02-23 12:00 |
04:59:33.74 |
+76:22:18.4 |
HIP 23114 |
14.06 |
| 2026-02-24 00:00 |
04:59:31.82 |
+76:21:48.2 |
HIP 23114 |
13.55 |