C/1996 Q1 (Tabur)
| Parameter |
Value |
| Designation |
C/1996 Q1 (Tabur) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1996-11-03T12:46:28.758720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:49Z |
| Obs used |
214 |
| NEO |
- |
| M1 |
11.000 |
| K1 |
10.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1996-09-15.0000000 |
| e |
0.99861194 |
| q (au) |
0.839803 |
| a (au) |
605.019223 |
| i (deg) |
73.355632 |
| Ω (om, deg) |
31.399626 |
| ω (w, deg) |
57.412892 |
| M (ma, deg) |
359.996720 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.549 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.549 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.999 |
| k |
1.000 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 1996-08-21 |
1996-09-14 |
+20.1141 |
-2.148 |
| 1996-09-14 |
1996-10-11 |
-2.1489 |
-0.245 |
| 1996-10-11 |
1996-11-03 |
-32.8718 |
-1.061 |
| 1996-11-03 |
1997-10-05 |
-2.7575 |
+1.733 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
13:46:35.83 |
-55:25:13.4 |
HIP 67111 |
12.28 |
| 2026-02-03 12:00 |
13:46:34.84 |
-55:25:35.3 |
HIP 67111 |
12.33 |
| 2026-02-04 00:00 |
13:46:33.81 |
-55:25:57.1 |
HIP 67111 |
12.39 |
| 2026-02-04 12:00 |
13:46:32.75 |
-55:26:18.7 |
HIP 67111 |
12.46 |
| 2026-02-05 00:00 |
13:46:31.66 |
-55:26:40.2 |
HIP 67111 |
12.54 |
| 2026-02-05 12:00 |
13:46:30.54 |
-55:27:01.5 |
HIP 67111 |
12.62 |
| 2026-02-06 00:00 |
13:46:29.38 |
-55:27:22.8 |
HIP 67111 |
12.70 |
| 2026-02-06 12:00 |
13:46:28.19 |
-55:27:43.9 |
HIP 67111 |
12.80 |
| 2026-02-07 00:00 |
13:46:26.98 |
-55:28:04.8 |
HIP 67111 |
12.90 |
| 2026-02-07 12:00 |
13:46:25.72 |
-55:28:25.6 |
HIP 67111 |
13.00 |
| 2026-02-08 00:00 |
13:46:24.44 |
-55:28:46.3 |
HIP 67111 |
13.12 |
| 2026-02-08 12:00 |
13:46:23.13 |
-55:29:06.9 |
HIP 67111 |
13.24 |
| 2026-02-09 00:00 |
13:46:21.78 |
-55:29:27.3 |
HIP 67111 |
13.36 |
| 2026-02-09 12:00 |
13:46:20.40 |
-55:29:47.5 |
HIP 67111 |
13.49 |
| 2026-02-10 00:00 |
13:46:19.00 |
-55:30:07.6 |
HIP 67111 |
13.62 |
| 2026-02-10 12:00 |
13:46:17.56 |
-55:30:27.6 |
HIP 67111 |
13.76 |
| 2026-02-11 00:00 |
13:46:16.08 |
-55:30:47.4 |
HIP 67111 |
13.91 |
| 2026-02-11 12:00 |
13:46:14.58 |
-55:31:07.1 |
HIP 67111 |
14.06 |
| 2026-02-12 00:00 |
13:46:13.05 |
-55:31:26.6 |
HIP 67111 |
14.21 |
| 2026-02-12 12:00 |
13:46:11.48 |
-55:31:45.9 |
HIP 67111 |
14.37 |
| 2026-02-13 00:00 |
13:46:09.89 |
-55:32:05.1 |
HIP 67111 |
14.53 |
| 2026-02-13 12:00 |
13:46:08.26 |
-55:32:24.2 |
HIP 67111 |
14.70 |
| 2026-02-14 00:00 |
13:46:06.60 |
-55:32:43.1 |
HIP 67111 |
14.87 |
| 2026-02-14 12:00 |
13:46:04.92 |
-55:33:01.8 |
HIP 67111 |
15.05 |
| 2026-02-15 00:00 |
13:46:03.20 |
-55:33:20.4 |
HIP 67111 |
15.23 |
| 2026-02-15 12:00 |
13:46:01.45 |
-55:33:38.8 |
HIP 67111 |
15.41 |
| 2026-02-16 00:00 |
13:45:59.67 |
-55:33:57.0 |
HIP 67111 |
15.60 |
| 2026-02-16 12:00 |
13:45:57.86 |
-55:34:15.1 |
HIP 67111 |
15.79 |
| 2026-02-17 00:00 |
13:45:56.02 |
-55:34:33.0 |
HIP 67111 |
15.98 |
| 2026-02-17 12:00 |
13:45:54.15 |
-55:34:50.7 |
HIP 67111 |
16.18 |
| 2026-02-18 00:00 |
13:45:52.26 |
-55:35:08.3 |
HIP 67111 |
16.38 |
| 2026-02-18 12:00 |
13:45:50.33 |
-55:35:25.7 |
HIP 67111 |
16.59 |
| 2026-02-19 00:00 |
13:45:48.37 |
-55:35:42.9 |
HIP 67111 |
16.80 |
| 2026-02-19 12:00 |
13:45:46.38 |
-55:36:00.0 |
HIP 67111 |
17.01 |
| 2026-02-20 00:00 |
13:45:44.37 |
-55:36:16.8 |
HIP 67111 |
17.22 |
| 2026-02-20 12:00 |
13:45:42.32 |
-55:36:33.5 |
HIP 67111 |
17.44 |
| 2026-02-21 00:00 |
13:45:40.25 |
-55:36:50.0 |
HIP 67096 |
17.22 |
| 2026-02-21 12:00 |
13:45:38.15 |
-55:37:06.3 |
HIP 67096 |
16.88 |
| 2026-02-22 00:00 |
13:45:36.02 |
-55:37:22.4 |
HIP 67096 |
16.55 |
| 2026-02-22 12:00 |
13:45:33.86 |
-55:37:38.4 |
HIP 67096 |
16.22 |
| 2026-02-23 00:00 |
13:45:31.68 |
-55:37:54.2 |
HIP 67096 |
15.90 |
| 2026-02-23 12:00 |
13:45:29.46 |
-55:38:09.8 |
HIP 67096 |
15.58 |
| 2026-02-24 00:00 |
13:45:27.22 |
-55:38:25.2 |
HIP 67096 |
15.27 |