| Parameter |
Value |
| Designation |
C/1953 T1 (Abell) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1954-07-07T08:24:47.105280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:12Z |
| Obs used |
39 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1954-03-29.0000000 |
| e |
1.00081195 |
| q (au) |
0.970185 |
| a (au) |
-1194.882510 |
| i (deg) |
53.228291 |
| Ω (om, deg) |
3.030697 |
| ω (w, deg) |
194.382085 |
| M (ma, deg) |
-0.002395 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.346 + 3.354\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.346 |
| n |
3.354 |
| gf |
0.831 |
| gb |
-0.664 |
| k |
1.000 |
| 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) |
| 2026-09-20 00:00 |
00:14:02.81 |
+03:53:13.6 |
HIP 1179 |
32.84 |
| 2026-09-20 12:00 |
00:14:01.70 |
+03:53:06.7 |
HIP 1179 |
32.82 |
| 2026-09-21 00:00 |
00:14:00.58 |
+03:52:59.8 |
HIP 1179 |
32.79 |
| 2026-09-21 12:00 |
00:13:59.47 |
+03:52:52.9 |
HIP 1179 |
32.77 |
| 2026-09-22 00:00 |
00:13:58.35 |
+03:52:46.0 |
HIP 1179 |
32.75 |
| 2026-09-22 12:00 |
00:13:57.24 |
+03:52:39.0 |
HIP 1179 |
32.74 |
| 2026-09-23 00:00 |
00:13:56.12 |
+03:52:32.1 |
HIP 1179 |
32.72 |
| 2026-09-23 12:00 |
00:13:55.00 |
+03:52:25.1 |
HIP 1179 |
32.71 |
| 2026-09-24 00:00 |
00:13:53.88 |
+03:52:18.2 |
HIP 1179 |
32.70 |
| 2026-09-24 12:00 |
00:13:52.76 |
+03:52:11.2 |
HIP 1179 |
32.70 |
| 2026-09-25 00:00 |
00:13:51.65 |
+03:52:04.2 |
HIP 1179 |
32.70 |
| 2026-09-25 12:00 |
00:13:50.53 |
+03:51:57.2 |
HIP 1179 |
32.70 |
| 2026-09-26 00:00 |
00:13:49.41 |
+03:51:50.2 |
HIP 1179 |
32.70 |
| 2026-09-26 12:00 |
00:13:48.29 |
+03:51:43.2 |
HIP 1179 |
32.70 |
| 2026-09-27 00:00 |
00:13:47.17 |
+03:51:36.1 |
HIP 1179 |
32.71 |
| 2026-09-27 12:00 |
00:13:46.04 |
+03:51:29.1 |
HIP 1179 |
32.72 |
| 2026-09-28 00:00 |
00:13:44.92 |
+03:51:22.1 |
HIP 1179 |
32.74 |
| 2026-09-28 12:00 |
00:13:43.80 |
+03:51:15.0 |
HIP 1179 |
32.75 |
| 2026-09-29 00:00 |
00:13:42.68 |
+03:51:08.0 |
HIP 1179 |
32.77 |
| 2026-09-29 12:00 |
00:13:41.57 |
+03:51:00.9 |
HIP 1179 |
32.79 |
| 2026-09-30 00:00 |
00:13:40.45 |
+03:50:53.9 |
HIP 1179 |
32.82 |
| 2026-09-30 12:00 |
00:13:39.33 |
+03:50:46.8 |
HIP 1179 |
32.84 |
| 2026-10-01 00:00 |
00:13:38.21 |
+03:50:39.8 |
HIP 1179 |
32.87 |
| 2026-10-01 12:00 |
00:13:37.09 |
+03:50:32.7 |
HIP 1179 |
32.90 |
| 2026-10-02 00:00 |
00:13:35.98 |
+03:50:25.6 |
HIP 1179 |
32.94 |
| 2026-10-02 12:00 |
00:13:34.86 |
+03:50:18.6 |
HIP 1179 |
32.98 |
| 2026-10-03 00:00 |
00:13:33.74 |
+03:50:11.5 |
HIP 1179 |
33.02 |
| 2026-10-03 12:00 |
00:13:32.63 |
+03:50:04.4 |
HIP 1179 |
33.06 |
| 2026-10-04 00:00 |
00:13:31.52 |
+03:49:57.4 |
HIP 1179 |
33.10 |
| 2026-10-04 12:00 |
00:13:30.41 |
+03:49:50.3 |
HIP 1179 |
33.15 |
| 2026-10-05 00:00 |
00:13:29.30 |
+03:49:43.2 |
HIP 1179 |
33.20 |
| 2026-10-05 12:00 |
00:13:28.19 |
+03:49:36.1 |
HIP 1179 |
33.25 |
| 2026-10-06 00:00 |
00:13:27.08 |
+03:49:29.1 |
HIP 1179 |
33.31 |
| 2026-10-06 12:00 |
00:13:25.97 |
+03:49:22.0 |
HIP 1179 |
33.37 |
| 2026-10-07 00:00 |
00:13:24.87 |
+03:49:15.0 |
HIP 1179 |
33.43 |
| 2026-10-07 12:00 |
00:13:23.76 |
+03:49:07.9 |
HIP 1179 |
33.49 |
| 2026-10-08 00:00 |
00:13:22.66 |
+03:49:00.9 |
HIP 1179 |
33.55 |
| 2026-10-08 12:00 |
00:13:21.56 |
+03:48:53.8 |
HIP 1179 |
33.62 |
| 2026-10-09 00:00 |
00:13:20.46 |
+03:48:46.8 |
HIP 1179 |
33.69 |
| 2026-10-09 12:00 |
00:13:19.37 |
+03:48:39.8 |
HIP 1179 |
33.76 |
| 2026-10-10 00:00 |
00:13:18.28 |
+03:48:32.7 |
HIP 1179 |
33.84 |
| 2026-10-10 12:00 |
00:13:17.18 |
+03:48:25.7 |
HIP 1179 |
33.91 |
| 2026-10-11 00:00 |
00:13:16.10 |
+03:48:18.7 |
HIP 1179 |
33.99 |