| 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 |
0.833 |
| gb |
-0.939 |
| k |
1.000 |
| δ90 |
9.991 |
| 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) |
| 2026-05-12 00:00 |
00:15:21.39 |
+03:58:15.8 |
HIP 1272 |
19.04 |
| 2026-05-12 12:00 |
00:15:22.15 |
+03:58:21.5 |
HIP 1272 |
18.87 |
| 2026-05-13 00:00 |
00:15:22.91 |
+03:58:27.1 |
HIP 1272 |
18.70 |
| 2026-05-13 12:00 |
00:15:23.66 |
+03:58:32.8 |
HIP 1272 |
18.53 |
| 2026-05-14 00:00 |
00:15:24.40 |
+03:58:38.3 |
HIP 1272 |
18.36 |
| 2026-05-14 12:00 |
00:15:25.14 |
+03:58:43.9 |
HIP 1272 |
18.20 |
| 2026-05-15 00:00 |
00:15:25.87 |
+03:58:49.4 |
HIP 1272 |
18.04 |
| 2026-05-15 12:00 |
00:15:26.60 |
+03:58:54.8 |
HIP 1272 |
17.88 |
| 2026-05-16 00:00 |
00:15:27.31 |
+03:59:00.2 |
HIP 1272 |
17.72 |
| 2026-05-16 12:00 |
00:15:28.02 |
+03:59:05.6 |
HIP 1272 |
17.56 |
| 2026-05-17 00:00 |
00:15:28.72 |
+03:59:10.9 |
HIP 1272 |
17.41 |
| 2026-05-17 12:00 |
00:15:29.42 |
+03:59:16.2 |
HIP 1272 |
17.26 |
| 2026-05-18 00:00 |
00:15:30.10 |
+03:59:21.4 |
HIP 1272 |
17.11 |
| 2026-05-18 12:00 |
00:15:30.78 |
+03:59:26.6 |
HIP 1272 |
16.97 |
| 2026-05-19 00:00 |
00:15:31.45 |
+03:59:31.8 |
HIP 1272 |
16.82 |
| 2026-05-19 12:00 |
00:15:32.12 |
+03:59:36.9 |
HIP 1272 |
16.68 |
| 2026-05-20 00:00 |
00:15:32.78 |
+03:59:41.9 |
HIP 1272 |
16.54 |
| 2026-05-20 12:00 |
00:15:33.43 |
+03:59:46.9 |
HIP 1272 |
16.40 |
| 2026-05-21 00:00 |
00:15:34.07 |
+03:59:51.9 |
HIP 1272 |
16.27 |
| 2026-05-21 12:00 |
00:15:34.70 |
+03:59:56.8 |
HIP 1272 |
16.14 |
| 2026-05-22 00:00 |
00:15:35.33 |
+04:00:01.7 |
HIP 1272 |
16.01 |
| 2026-05-22 12:00 |
00:15:35.95 |
+04:00:06.5 |
HIP 1272 |
15.88 |
| 2026-05-23 00:00 |
00:15:36.56 |
+04:00:11.3 |
HIP 1272 |
15.75 |
| 2026-05-23 12:00 |
00:15:37.16 |
+04:00:16.0 |
HIP 1272 |
15.63 |
| 2026-05-24 00:00 |
00:15:37.76 |
+04:00:20.7 |
HIP 1272 |
15.51 |
| 2026-05-24 12:00 |
00:15:38.34 |
+04:00:25.3 |
HIP 1272 |
15.39 |
| 2026-05-25 00:00 |
00:15:38.92 |
+04:00:29.9 |
HIP 1272 |
15.27 |
| 2026-05-25 12:00 |
00:15:39.49 |
+04:00:34.5 |
HIP 1272 |
15.16 |
| 2026-05-26 00:00 |
00:15:40.06 |
+04:00:39.0 |
HIP 1272 |
15.05 |
| 2026-05-26 12:00 |
00:15:40.61 |
+04:00:43.4 |
HIP 1272 |
14.94 |
| 2026-05-27 00:00 |
00:15:41.16 |
+04:00:47.8 |
HIP 1272 |
14.83 |
| 2026-05-27 12:00 |
00:15:41.70 |
+04:00:52.1 |
HIP 1272 |
14.72 |
| 2026-05-28 00:00 |
00:15:42.23 |
+04:00:56.4 |
HIP 1272 |
14.62 |
| 2026-05-28 12:00 |
00:15:42.75 |
+04:01:00.7 |
HIP 1272 |
14.52 |
| 2026-05-29 00:00 |
00:15:43.27 |
+04:01:04.9 |
HIP 1272 |
14.42 |
| 2026-05-29 12:00 |
00:15:43.77 |
+04:01:09.0 |
HIP 1272 |
14.32 |
| 2026-05-30 00:00 |
00:15:44.27 |
+04:01:13.1 |
HIP 1272 |
14.23 |
| 2026-05-30 12:00 |
00:15:44.76 |
+04:01:17.2 |
HIP 1272 |
14.13 |
| 2026-05-31 00:00 |
00:15:45.24 |
+04:01:21.2 |
HIP 1272 |
14.04 |
| 2026-05-31 12:00 |
00:15:45.72 |
+04:01:25.1 |
HIP 1272 |
13.95 |
| 2026-06-01 00:00 |
00:15:46.18 |
+04:01:29.0 |
HIP 1272 |
13.87 |
| 2026-06-01 12:00 |
00:15:46.64 |
+04:01:32.8 |
HIP 1272 |
13.78 |
| 2026-06-02 00:00 |
00:15:47.09 |
+04:01:36.6 |
HIP 1272 |
13.70 |