| Parameter |
Value |
| Designation |
C/1949 N1 (Bappu-Bok-Newkirk) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1949-10-26T13:04:54.004800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:09Z |
| Obs used |
30 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1950-05-10.0000000 |
| e |
0.99878218 |
| q (au) |
2.058250 |
| a (au) |
1690.114081 |
| i (deg) |
105.767785 |
| Ω (om, deg) |
309.709849 |
| ω (w, deg) |
89.525738 |
| M (ma, deg) |
0.002773 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.349 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.349 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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) |
| 2026-07-29 00:00 |
05:56:59.27 |
-43:18:01.1 |
HIP 28226 |
20.24 |
| 2026-07-29 12:00 |
05:57:00.54 |
-43:18:11.1 |
HIP 28226 |
19.99 |
| 2026-07-30 00:00 |
05:57:01.80 |
-43:18:21.2 |
HIP 28226 |
19.74 |
| 2026-07-30 12:00 |
05:57:03.06 |
-43:18:31.4 |
HIP 28226 |
19.48 |
| 2026-07-31 00:00 |
05:57:04.30 |
-43:18:41.7 |
HIP 28226 |
19.23 |
| 2026-07-31 12:00 |
05:57:05.54 |
-43:18:52.1 |
HIP 28226 |
18.98 |
| 2026-08-01 00:00 |
05:57:06.77 |
-43:19:02.7 |
HIP 28226 |
18.73 |
| 2026-08-01 12:00 |
05:57:07.99 |
-43:19:13.3 |
HIP 28226 |
18.47 |
| 2026-08-02 00:00 |
05:57:09.21 |
-43:19:24.1 |
HIP 28226 |
18.22 |
| 2026-08-02 12:00 |
05:57:10.41 |
-43:19:34.9 |
HIP 28226 |
17.97 |
| 2026-08-03 00:00 |
05:57:11.61 |
-43:19:45.9 |
HIP 28226 |
17.71 |
| 2026-08-03 12:00 |
05:57:12.79 |
-43:19:56.9 |
HIP 28226 |
17.46 |
| 2026-08-04 00:00 |
05:57:13.97 |
-43:20:08.1 |
HIP 28226 |
17.21 |
| 2026-08-04 12:00 |
05:57:15.14 |
-43:20:19.4 |
HIP 28226 |
16.96 |
| 2026-08-05 00:00 |
05:57:16.30 |
-43:20:30.8 |
HIP 28226 |
16.70 |
| 2026-08-05 12:00 |
05:57:17.45 |
-43:20:42.2 |
HIP 28226 |
16.45 |
| 2026-08-06 00:00 |
05:57:18.60 |
-43:20:53.8 |
HIP 28226 |
16.20 |
| 2026-08-06 12:00 |
05:57:19.73 |
-43:21:05.5 |
HIP 28226 |
15.94 |
| 2026-08-07 00:00 |
05:57:20.85 |
-43:21:17.2 |
HIP 28226 |
15.69 |
| 2026-08-07 12:00 |
05:57:21.96 |
-43:21:29.1 |
HIP 28226 |
15.44 |
| 2026-08-08 00:00 |
05:57:23.07 |
-43:21:41.1 |
HIP 28226 |
15.19 |
| 2026-08-08 12:00 |
05:57:24.16 |
-43:21:53.1 |
HIP 28226 |
14.93 |
| 2026-08-09 00:00 |
05:57:25.25 |
-43:22:05.3 |
HIP 28226 |
14.68 |
| 2026-08-09 12:00 |
05:57:26.32 |
-43:22:17.6 |
HIP 28226 |
14.43 |
| 2026-08-10 00:00 |
05:57:27.39 |
-43:22:29.9 |
HIP 28226 |
14.17 |
| 2026-08-10 12:00 |
05:57:28.44 |
-43:22:42.3 |
HIP 28226 |
13.92 |
| 2026-08-11 00:00 |
05:57:29.49 |
-43:22:54.9 |
HIP 28226 |
13.67 |
| 2026-08-11 12:00 |
05:57:30.52 |
-43:23:07.5 |
HIP 28226 |
13.42 |
| 2026-08-12 00:00 |
05:57:31.55 |
-43:23:20.2 |
HIP 28226 |
13.17 |
| 2026-08-12 12:00 |
05:57:32.56 |
-43:23:33.0 |
HIP 28226 |
12.91 |
| 2026-08-13 00:00 |
05:57:33.56 |
-43:23:45.9 |
HIP 28226 |
12.66 |
| 2026-08-13 12:00 |
05:57:34.56 |
-43:23:58.9 |
HIP 28226 |
12.41 |
| 2026-08-14 00:00 |
05:57:35.54 |
-43:24:12.0 |
HIP 28226 |
12.16 |
| 2026-08-14 12:00 |
05:57:36.51 |
-43:24:25.2 |
HIP 28226 |
11.91 |
| 2026-08-15 00:00 |
05:57:37.47 |
-43:24:38.4 |
HIP 28226 |
11.66 |
| 2026-08-15 12:00 |
05:57:38.42 |
-43:24:51.8 |
HIP 28226 |
11.41 |
| 2026-08-16 00:00 |
05:57:39.36 |
-43:25:05.2 |
HIP 28226 |
11.16 |
| 2026-08-16 12:00 |
05:57:40.28 |
-43:25:18.7 |
HIP 28226 |
10.91 |
| 2026-08-17 00:00 |
05:57:41.20 |
-43:25:32.3 |
HIP 28226 |
10.67 |
| 2026-08-17 12:00 |
05:57:42.11 |
-43:25:45.9 |
HIP 28226 |
10.42 |
| 2026-08-18 00:00 |
05:57:43.00 |
-43:25:59.7 |
HIP 28226 |
10.17 |
| 2026-08-18 12:00 |
05:57:43.88 |
-43:26:13.5 |
HIP 28226 |
9.93 |
| 2026-08-19 00:00 |
05:57:44.76 |
-43:26:27.4 |
HIP 28226 |
9.68 |