| Parameter |
Value |
| Designation |
P/2007 T2 (Kowalski) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-09-19T00:32:30.549120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:12Z |
| Obs used |
50 |
| NEO |
Yes |
| M1 |
18.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2007-11-07.0000000 |
| e |
0.77500898 |
| q (au) |
0.695817 |
| a (au) |
3.092645 |
| i (deg) |
9.896422 |
| Ω (om, deg) |
3.997657 |
| ω (w, deg) |
358.553636 |
| M (ma, deg) |
8.875747 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.609 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.609 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.952 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
11:42:12.15 |
+01:55:50.7 |
HIP 57107 |
26.10 |
| 2026-07-29 12:00 |
11:42:26.96 |
+01:54:04.1 |
HIP 57107 |
27.67 |
| 2026-07-30 00:00 |
11:42:41.86 |
+01:52:16.9 |
HIP 57107 |
29.73 |
| 2026-07-30 12:00 |
11:42:56.83 |
+01:50:29.3 |
HIP 57107 |
32.20 |
| 2026-07-31 00:00 |
11:43:11.88 |
+01:48:41.1 |
HIP 57315 |
31.65 |
| 2026-07-31 12:00 |
11:43:27.01 |
+01:46:52.4 |
HIP 57315 |
27.46 |
| 2026-08-01 00:00 |
11:43:42.23 |
+01:45:03.2 |
HIP 57315 |
23.24 |
| 2026-08-01 12:00 |
11:43:57.52 |
+01:43:13.6 |
HIP 57315 |
19.01 |
| 2026-08-02 00:00 |
11:44:12.88 |
+01:41:23.4 |
HIP 57315 |
14.75 |
| 2026-08-02 12:00 |
11:44:28.33 |
+01:39:32.7 |
HIP 57315 |
10.48 |
| 2026-08-03 00:00 |
11:44:43.85 |
+01:37:41.6 |
HIP 57315 |
6.18 |
| 2026-08-03 12:00 |
11:44:59.44 |
+01:35:49.9 |
HIP 57315 |
1.89 |
| 2026-08-04 00:00 |
11:45:15.12 |
+01:33:57.8 |
HIP 57315 |
2.51 |
| 2026-08-04 12:00 |
11:45:30.86 |
+01:32:05.2 |
HIP 57315 |
6.85 |
| 2026-08-05 00:00 |
11:45:46.68 |
+01:30:12.2 |
HIP 57315 |
11.23 |
| 2026-08-05 12:00 |
11:46:02.58 |
+01:28:18.7 |
HIP 57315 |
15.63 |
| 2026-08-06 00:00 |
11:46:18.54 |
+01:26:24.7 |
HIP 57315 |
20.05 |
| 2026-08-06 12:00 |
11:46:34.58 |
+01:24:30.2 |
HIP 57315 |
24.49 |
| 2026-08-07 00:00 |
11:46:50.69 |
+01:22:35.3 |
HIP 57315 |
28.94 |
| 2026-08-07 12:00 |
11:47:06.87 |
+01:20:39.9 |
HIP 57315 |
33.42 |
| 2026-08-08 00:00 |
11:47:23.12 |
+01:18:44.1 |
HIP 57548 |
30.73 |
| 2026-08-08 12:00 |
11:47:39.44 |
+01:16:47.8 |
HIP 57548 |
28.37 |
| 2026-08-09 00:00 |
11:47:55.83 |
+01:14:51.1 |
HIP 57548 |
26.56 |
| 2026-08-09 12:00 |
11:48:12.29 |
+01:12:54.0 |
HIP 57548 |
25.45 |
| 2026-08-10 00:00 |
11:48:28.81 |
+01:10:56.4 |
HIP 57548 |
25.12 |
| 2026-08-10 12:00 |
11:48:45.40 |
+01:08:58.4 |
HIP 57548 |
25.62 |
| 2026-08-11 00:00 |
11:49:02.06 |
+01:07:00.0 |
HIP 57548 |
26.91 |
| 2026-08-11 12:00 |
11:49:18.78 |
+01:05:01.2 |
HIP 57658 |
28.56 |
| 2026-08-12 00:00 |
11:49:35.57 |
+01:03:01.9 |
HIP 57658 |
26.55 |
| 2026-08-12 12:00 |
11:49:52.42 |
+01:01:02.2 |
HIP 57658 |
25.23 |
| 2026-08-13 00:00 |
11:50:09.33 |
+00:59:02.2 |
HIP 57658 |
24.73 |
| 2026-08-13 12:00 |
11:50:26.31 |
+00:57:01.7 |
HIP 57658 |
25.11 |
| 2026-08-14 00:00 |
11:50:43.34 |
+00:55:00.8 |
HIP 57658 |
26.35 |
| 2026-08-14 12:00 |
11:51:00.44 |
+00:52:59.6 |
HIP 57658 |
28.33 |
| 2026-08-15 00:00 |
11:51:17.60 |
+00:50:57.9 |
HIP 57658 |
30.93 |
| 2026-08-15 12:00 |
11:51:34.82 |
+00:48:55.9 |
HIP 57658 |
34.00 |
| 2026-08-16 00:00 |
11:51:52.09 |
+00:46:53.5 |
HIP 57878 |
32.58 |
| 2026-08-16 12:00 |
11:52:09.43 |
+00:44:50.8 |
HIP 58002 |
27.81 |
| 2026-08-17 00:00 |
11:52:26.82 |
+00:42:47.6 |
HIP 58002 |
23.00 |
| 2026-08-17 12:00 |
11:52:44.26 |
+00:40:44.2 |
HIP 58002 |
18.18 |
| 2026-08-18 00:00 |
11:53:01.77 |
+00:38:40.3 |
HIP 58002 |
13.34 |
| 2026-08-18 12:00 |
11:53:19.32 |
+00:36:36.1 |
HIP 58002 |
8.49 |
| 2026-08-19 00:00 |
11:53:36.93 |
+00:34:31.6 |
HIP 58002 |
3.62 |