| Parameter |
Value |
| Designation |
C/1958 R1 (Burnham-Slaughter) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1959-03-11T12:29:09.669120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
40 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1959-04-21.0000000 |
| e |
0.99984492 |
| q (au) |
1.628202 |
| a (au) |
10499.160647 |
| i (deg) |
61.257360 |
| Ω (om, deg) |
323.778245 |
| ω (w, deg) |
100.736624 |
| M (ma, deg) |
0.000037 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.937 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.937 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-06-01 00:00 |
11:30:02.79 |
-69:33:35.2 |
HIP 55771 |
24.58 |
| 2026-06-01 12:00 |
11:30:02.13 |
-69:33:17.1 |
HIP 55771 |
24.42 |
| 2026-06-02 00:00 |
11:30:01.49 |
-69:32:58.9 |
HIP 55771 |
24.27 |
| 2026-06-02 12:00 |
11:30:00.89 |
-69:32:40.8 |
HIP 55771 |
24.13 |
| 2026-06-03 00:00 |
11:30:00.31 |
-69:32:22.6 |
HIP 55771 |
23.99 |
| 2026-06-03 12:00 |
11:29:59.76 |
-69:32:04.4 |
HIP 55771 |
23.85 |
| 2026-06-04 00:00 |
11:29:59.24 |
-69:31:46.2 |
HIP 55771 |
23.73 |
| 2026-06-04 12:00 |
11:29:58.75 |
-69:31:28.0 |
HIP 55771 |
23.60 |
| 2026-06-05 00:00 |
11:29:58.29 |
-69:31:09.9 |
HIP 55771 |
23.49 |
| 2026-06-05 12:00 |
11:29:57.85 |
-69:30:51.7 |
HIP 55771 |
23.38 |
| 2026-06-06 00:00 |
11:29:57.44 |
-69:30:33.5 |
HIP 55771 |
23.27 |
| 2026-06-06 12:00 |
11:29:57.07 |
-69:30:15.3 |
HIP 55771 |
23.17 |
| 2026-06-07 00:00 |
11:29:56.72 |
-69:29:57.1 |
HIP 55771 |
23.08 |
| 2026-06-07 12:00 |
11:29:56.40 |
-69:29:38.9 |
HIP 55771 |
22.99 |
| 2026-06-08 00:00 |
11:29:56.10 |
-69:29:20.7 |
HIP 55771 |
22.91 |
| 2026-06-08 12:00 |
11:29:55.84 |
-69:29:02.6 |
HIP 55771 |
22.84 |
| 2026-06-09 00:00 |
11:29:55.61 |
-69:28:44.4 |
HIP 55771 |
22.77 |
| 2026-06-09 12:00 |
11:29:55.40 |
-69:28:26.2 |
HIP 55771 |
22.71 |
| 2026-06-10 00:00 |
11:29:55.22 |
-69:28:08.1 |
HIP 55771 |
22.65 |
| 2026-06-10 12:00 |
11:29:55.07 |
-69:27:50.0 |
HIP 55771 |
22.60 |
| 2026-06-11 00:00 |
11:29:54.95 |
-69:27:31.8 |
HIP 55771 |
22.56 |
| 2026-06-11 12:00 |
11:29:54.86 |
-69:27:13.7 |
HIP 55771 |
22.53 |
| 2026-06-12 00:00 |
11:29:54.79 |
-69:26:55.6 |
HIP 55771 |
22.50 |
| 2026-06-12 12:00 |
11:29:54.76 |
-69:26:37.6 |
HIP 55771 |
22.47 |
| 2026-06-13 00:00 |
11:29:54.75 |
-69:26:19.5 |
HIP 55771 |
22.46 |
| 2026-06-13 12:00 |
11:29:54.78 |
-69:26:01.5 |
HIP 55771 |
22.45 |
| 2026-06-14 00:00 |
11:29:54.83 |
-69:25:43.5 |
HIP 55771 |
22.44 |
| 2026-06-14 12:00 |
11:29:54.91 |
-69:25:25.5 |
HIP 55771 |
22.45 |
| 2026-06-15 00:00 |
11:29:55.01 |
-69:25:07.5 |
HIP 55771 |
22.46 |
| 2026-06-15 12:00 |
11:29:55.15 |
-69:24:49.5 |
HIP 55771 |
22.47 |
| 2026-06-16 00:00 |
11:29:55.31 |
-69:24:31.6 |
HIP 55771 |
22.50 |
| 2026-06-16 12:00 |
11:29:55.51 |
-69:24:13.7 |
HIP 55771 |
22.53 |
| 2026-06-17 00:00 |
11:29:55.73 |
-69:23:55.9 |
HIP 55771 |
22.56 |
| 2026-06-17 12:00 |
11:29:55.98 |
-69:23:38.1 |
HIP 55771 |
22.60 |
| 2026-06-18 00:00 |
11:29:56.26 |
-69:23:20.3 |
HIP 55771 |
22.65 |
| 2026-06-18 12:00 |
11:29:56.56 |
-69:23:02.5 |
HIP 55771 |
22.71 |
| 2026-06-19 00:00 |
11:29:56.90 |
-69:22:44.8 |
HIP 55771 |
22.77 |
| 2026-06-19 12:00 |
11:29:57.26 |
-69:22:27.1 |
HIP 55771 |
22.83 |
| 2026-06-20 00:00 |
11:29:57.65 |
-69:22:09.4 |
HIP 55771 |
22.90 |
| 2026-06-20 12:00 |
11:29:58.07 |
-69:21:51.8 |
HIP 55771 |
22.98 |
| 2026-06-21 00:00 |
11:29:58.51 |
-69:21:34.3 |
HIP 55771 |
23.07 |
| 2026-06-21 12:00 |
11:29:58.99 |
-69:21:16.7 |
HIP 55771 |
23.16 |
| 2026-06-22 00:00 |
11:29:59.49 |
-69:20:59.2 |
HIP 55771 |
23.25 |