| Parameter |
Value |
| Designation |
C/1996 P2 (Russell-Watson) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1996-03-01T07:54:27.348480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:50Z |
| Obs used |
157 |
| NEO |
- |
| M1 |
5.000 |
| K1 |
12.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1996-11-19.0000000 |
| e |
1.00008354 |
| q (au) |
2.005854 |
| a (au) |
-24011.991404 |
| i (deg) |
29.083130 |
| Ω (om, deg) |
101.403478 |
| ω (w, deg) |
188.799531 |
| M (ma, deg) |
0.000070 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.223 + 4.641\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.223 |
| n |
4.641 |
| gf |
0.998 |
| gb |
-1.000 |
| k |
0.999 |
| 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) |
| 2026-06-01 00:00 |
05:56:05.92 |
+16:58:50.1 |
HIP 28167 |
14.86 |
| 2026-06-01 12:00 |
05:56:08.16 |
+16:58:52.1 |
HIP 28167 |
14.32 |
| 2026-06-02 00:00 |
05:56:10.40 |
+16:58:54.1 |
HIP 28167 |
13.78 |
| 2026-06-02 12:00 |
05:56:12.65 |
+16:58:56.0 |
HIP 28167 |
13.25 |
| 2026-06-03 00:00 |
05:56:14.91 |
+16:58:58.0 |
HIP 28167 |
12.71 |
| 2026-06-03 12:00 |
05:56:17.17 |
+16:58:59.9 |
HIP 28167 |
12.17 |
| 2026-06-04 00:00 |
05:56:19.43 |
+16:59:01.7 |
HIP 28167 |
11.63 |
| 2026-06-04 12:00 |
05:56:21.70 |
+16:59:03.6 |
HIP 28167 |
11.08 |
| 2026-06-05 00:00 |
05:56:23.98 |
+16:59:05.4 |
HIP 28167 |
10.54 |
| 2026-06-05 12:00 |
05:56:26.26 |
+16:59:07.1 |
HIP 28167 |
10.00 |
| 2026-06-06 00:00 |
05:56:28.55 |
+16:59:08.9 |
HIP 28167 |
9.45 |
| 2026-06-06 12:00 |
05:56:30.84 |
+16:59:10.6 |
HIP 28167 |
8.91 |
| 2026-06-07 00:00 |
05:56:33.13 |
+16:59:12.3 |
HIP 28167 |
8.36 |
| 2026-06-07 12:00 |
05:56:35.43 |
+16:59:13.9 |
HIP 28167 |
7.82 |
| 2026-06-08 00:00 |
05:56:37.73 |
+16:59:15.5 |
HIP 28167 |
7.27 |
| 2026-06-08 12:00 |
05:56:40.04 |
+16:59:17.1 |
HIP 28167 |
6.73 |
| 2026-06-09 00:00 |
05:56:42.35 |
+16:59:18.6 |
HIP 28167 |
6.18 |
| 2026-06-09 12:00 |
05:56:44.66 |
+16:59:20.2 |
HIP 28167 |
5.64 |
| 2026-06-10 00:00 |
05:56:46.98 |
+16:59:21.6 |
HIP 28167 |
5.09 |
| 2026-06-10 12:00 |
05:56:49.30 |
+16:59:23.1 |
HIP 28167 |
4.55 |
| 2026-06-11 00:00 |
05:56:51.63 |
+16:59:24.5 |
HIP 28167 |
4.01 |
| 2026-06-11 12:00 |
05:56:53.95 |
+16:59:25.9 |
HIP 28167 |
3.48 |
| 2026-06-12 00:00 |
05:56:56.28 |
+16:59:27.3 |
HIP 28167 |
2.95 |
| 2026-06-12 12:00 |
05:56:58.62 |
+16:59:28.6 |
HIP 28167 |
2.44 |
| 2026-06-13 00:00 |
05:57:00.95 |
+16:59:29.9 |
HIP 28167 |
1.96 |
| 2026-06-13 12:00 |
05:57:03.29 |
+16:59:31.1 |
HIP 28167 |
1.53 |
| 2026-06-14 00:00 |
05:57:05.63 |
+16:59:32.4 |
HIP 28167 |
1.20 |
| 2026-06-14 12:00 |
05:57:07.97 |
+16:59:33.5 |
HIP 28167 |
1.09 |
| 2026-06-15 00:00 |
05:57:10.32 |
+16:59:34.7 |
HIP 28167 |
1.25 |
| 2026-06-15 12:00 |
05:57:12.66 |
+16:59:35.8 |
HIP 28167 |
1.60 |
| 2026-06-16 00:00 |
05:57:15.01 |
+16:59:36.9 |
HIP 28167 |
2.05 |
| 2026-06-16 12:00 |
05:57:17.36 |
+16:59:38.0 |
HIP 28167 |
2.55 |
| 2026-06-17 00:00 |
05:57:19.71 |
+16:59:39.0 |
HIP 28167 |
3.06 |
| 2026-06-17 12:00 |
05:57:22.06 |
+16:59:40.0 |
HIP 28167 |
3.60 |
| 2026-06-18 00:00 |
05:57:24.41 |
+16:59:41.0 |
HIP 28167 |
4.14 |
| 2026-06-18 12:00 |
05:57:26.77 |
+16:59:41.9 |
HIP 28167 |
4.68 |
| 2026-06-19 00:00 |
05:57:29.12 |
+16:59:42.8 |
HIP 28167 |
5.23 |
| 2026-06-19 12:00 |
05:57:31.47 |
+16:59:43.7 |
HIP 28167 |
5.78 |
| 2026-06-20 00:00 |
05:57:33.83 |
+16:59:44.5 |
HIP 28167 |
6.34 |
| 2026-06-20 12:00 |
05:57:36.18 |
+16:59:45.3 |
HIP 28167 |
6.89 |
| 2026-06-21 00:00 |
05:57:38.54 |
+16:59:46.0 |
HIP 28167 |
7.45 |
| 2026-06-21 12:00 |
05:57:40.89 |
+16:59:46.8 |
HIP 28167 |
8.01 |
| 2026-06-22 00:00 |
05:57:43.25 |
+16:59:47.5 |
HIP 28167 |
8.57 |