| Parameter |
Value |
| Designation |
C/1958 D1 (Burnham) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1958-04-16T07:16:54.157440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
22 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1958-04-26.0000000 |
| e |
0.99991611 |
| q (au) |
1.322687 |
| a (au) |
15766.142934 |
| i (deg) |
15.787940 |
| Ω (om, deg) |
151.194462 |
| ω (w, deg) |
16.465841 |
| M (ma, deg) |
0.000005 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.825 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.825 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 1958-02-22 |
1958-04-15 |
+53.8968 |
-6.982 |
| 1958-04-17 |
1958-09-15 |
+11.0165 |
-1.782 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
22:26:52.81 |
-10:38:32.7 |
HIP 110796 |
1.35 |
| 2026-06-01 12:00 |
22:26:52.72 |
-10:38:33.6 |
HIP 110796 |
1.35 |
| 2026-06-02 00:00 |
22:26:52.63 |
-10:38:34.6 |
HIP 110796 |
1.35 |
| 2026-06-02 12:00 |
22:26:52.52 |
-10:38:35.6 |
HIP 110796 |
1.35 |
| 2026-06-03 00:00 |
22:26:52.41 |
-10:38:36.7 |
HIP 110796 |
1.34 |
| 2026-06-03 12:00 |
22:26:52.28 |
-10:38:37.8 |
HIP 110796 |
1.34 |
| 2026-06-04 00:00 |
22:26:52.14 |
-10:38:39.0 |
HIP 110796 |
1.34 |
| 2026-06-04 12:00 |
22:26:52.00 |
-10:38:40.2 |
HIP 110796 |
1.33 |
| 2026-06-05 00:00 |
22:26:51.84 |
-10:38:41.6 |
HIP 110796 |
1.33 |
| 2026-06-05 12:00 |
22:26:51.67 |
-10:38:42.9 |
HIP 110796 |
1.33 |
| 2026-06-06 00:00 |
22:26:51.50 |
-10:38:44.4 |
HIP 110796 |
1.34 |
| 2026-06-06 12:00 |
22:26:51.31 |
-10:38:45.9 |
HIP 110796 |
1.34 |
| 2026-06-07 00:00 |
22:26:51.11 |
-10:38:47.4 |
HIP 110796 |
1.34 |
| 2026-06-07 12:00 |
22:26:50.90 |
-10:38:49.0 |
HIP 110796 |
1.35 |
| 2026-06-08 00:00 |
22:26:50.69 |
-10:38:50.7 |
HIP 110796 |
1.36 |
| 2026-06-08 12:00 |
22:26:50.46 |
-10:38:52.4 |
HIP 110796 |
1.38 |
| 2026-06-09 00:00 |
22:26:50.22 |
-10:38:54.2 |
HIP 110796 |
1.39 |
| 2026-06-09 12:00 |
22:26:49.97 |
-10:38:56.0 |
HIP 110796 |
1.41 |
| 2026-06-10 00:00 |
22:26:49.72 |
-10:38:57.9 |
HIP 110796 |
1.44 |
| 2026-06-10 12:00 |
22:26:49.45 |
-10:38:59.9 |
HIP 110796 |
1.46 |
| 2026-06-11 00:00 |
22:26:49.17 |
-10:39:01.9 |
HIP 110796 |
1.49 |
| 2026-06-11 12:00 |
22:26:48.88 |
-10:39:03.9 |
HIP 110796 |
1.53 |
| 2026-06-12 00:00 |
22:26:48.58 |
-10:39:06.1 |
HIP 110796 |
1.57 |
| 2026-06-12 12:00 |
22:26:48.27 |
-10:39:08.2 |
HIP 110796 |
1.62 |
| 2026-06-13 00:00 |
22:26:47.96 |
-10:39:10.5 |
HIP 110796 |
1.66 |
| 2026-06-13 12:00 |
22:26:47.63 |
-10:39:12.8 |
HIP 110796 |
1.72 |
| 2026-06-14 00:00 |
22:26:47.29 |
-10:39:15.1 |
HIP 110796 |
1.78 |
| 2026-06-14 12:00 |
22:26:46.94 |
-10:39:17.6 |
HIP 110796 |
1.84 |
| 2026-06-15 00:00 |
22:26:46.58 |
-10:39:20.0 |
HIP 110796 |
1.90 |
| 2026-06-15 12:00 |
22:26:46.22 |
-10:39:22.6 |
HIP 110796 |
1.97 |
| 2026-06-16 00:00 |
22:26:45.84 |
-10:39:25.1 |
HIP 110796 |
2.05 |
| 2026-06-16 12:00 |
22:26:45.45 |
-10:39:27.8 |
HIP 110796 |
2.13 |
| 2026-06-17 00:00 |
22:26:45.05 |
-10:39:30.5 |
HIP 110796 |
2.21 |
| 2026-06-17 12:00 |
22:26:44.65 |
-10:39:33.2 |
HIP 110796 |
2.30 |
| 2026-06-18 00:00 |
22:26:44.23 |
-10:39:36.0 |
HIP 110796 |
2.39 |
| 2026-06-18 12:00 |
22:26:43.80 |
-10:39:38.9 |
HIP 110796 |
2.49 |
| 2026-06-19 00:00 |
22:26:43.37 |
-10:39:41.8 |
HIP 110796 |
2.58 |
| 2026-06-19 12:00 |
22:26:42.92 |
-10:39:44.8 |
HIP 110796 |
2.69 |
| 2026-06-20 00:00 |
22:26:42.46 |
-10:39:47.8 |
HIP 110796 |
2.79 |
| 2026-06-20 12:00 |
22:26:42.00 |
-10:39:50.9 |
HIP 110796 |
2.90 |
| 2026-06-21 00:00 |
22:26:41.53 |
-10:39:54.0 |
HIP 110796 |
3.01 |
| 2026-06-21 12:00 |
22:26:41.04 |
-10:39:57.2 |
HIP 110796 |
3.13 |
| 2026-06-22 00:00 |
22:26:40.55 |
-10:40:00.4 |
HIP 110796 |
3.25 |