메타데이터
| 항목 |
값 |
| Designation |
C/1991 C3 (McNaught-Russell) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1990-10-18T13:20:57.874560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:41Z |
| Obs used |
42 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1991-06-24.0000000 |
| e |
1.00249603 |
| q (au) |
4.777706 |
| a (au) |
-1914.125633 |
| i (deg) |
113.443762 |
| Ω (om, deg) |
161.705796 |
| ω (w, deg) |
320.929727 |
| M (ma, deg) |
0.002924 |
밝기
산란 + 전체 선형
$$
M_a = (9.686 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.686 |
| n |
2.000 |
| gf |
0.998 |
| gb |
-0.502 |
| k |
1.000 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
23:02:27.86 |
+66:11:17.4 |
HIP 114140 |
27.90 |
| 2026-09-20 12:00 |
23:02:23.17 |
+66:11:05.0 |
HIP 114140 |
28.33 |
| 2026-09-21 00:00 |
23:02:18.49 |
+66:10:52.3 |
HIP 114140 |
28.76 |
| 2026-09-21 12:00 |
23:02:13.83 |
+66:10:39.4 |
HIP 114140 |
29.19 |
| 2026-09-22 00:00 |
23:02:09.17 |
+66:10:26.2 |
HIP 114140 |
29.62 |
| 2026-09-22 12:00 |
23:02:04.52 |
+66:10:12.7 |
HIP 113350 |
29.61 |
| 2026-09-23 00:00 |
23:01:59.89 |
+66:09:59.0 |
HIP 113350 |
29.10 |
| 2026-09-23 12:00 |
23:01:55.27 |
+66:09:45.1 |
HIP 113350 |
28.59 |
| 2026-09-24 00:00 |
23:01:50.66 |
+66:09:30.9 |
HIP 113350 |
28.09 |
| 2026-09-24 12:00 |
23:01:46.06 |
+66:09:16.5 |
HIP 113350 |
27.58 |
| 2026-09-25 00:00 |
23:01:41.48 |
+66:09:01.8 |
HIP 113350 |
27.08 |
| 2026-09-25 12:00 |
23:01:36.91 |
+66:08:46.9 |
HIP 113350 |
26.57 |
| 2026-09-26 00:00 |
23:01:32.36 |
+66:08:31.7 |
HIP 113350 |
26.07 |
| 2026-09-26 12:00 |
23:01:27.82 |
+66:08:16.3 |
HIP 113350 |
25.57 |
| 2026-09-27 00:00 |
23:01:23.29 |
+66:08:00.7 |
HIP 113350 |
25.07 |
| 2026-09-27 12:00 |
23:01:18.78 |
+66:07:44.8 |
HIP 113350 |
24.57 |
| 2026-09-28 00:00 |
23:01:14.29 |
+66:07:28.6 |
HIP 113350 |
24.07 |
| 2026-09-28 12:00 |
23:01:09.81 |
+66:07:12.3 |
HIP 113350 |
23.58 |
| 2026-09-29 00:00 |
23:01:05.35 |
+66:06:55.7 |
HIP 113350 |
23.09 |
| 2026-09-29 12:00 |
23:01:00.90 |
+66:06:38.8 |
HIP 113350 |
22.60 |
| 2026-09-30 00:00 |
23:00:56.47 |
+66:06:21.7 |
HIP 113350 |
22.11 |
| 2026-09-30 12:00 |
23:00:52.06 |
+66:06:04.4 |
HIP 113350 |
21.63 |
| 2026-10-01 00:00 |
23:00:47.66 |
+66:05:46.9 |
HIP 113350 |
21.15 |
| 2026-10-01 12:00 |
23:00:43.29 |
+66:05:29.1 |
HIP 113350 |
20.68 |
| 2026-10-02 00:00 |
23:00:38.93 |
+66:05:11.1 |
HIP 113350 |
20.20 |
| 2026-10-02 12:00 |
23:00:34.59 |
+66:04:52.8 |
HIP 113350 |
19.74 |
| 2026-10-03 00:00 |
23:00:30.27 |
+66:04:34.3 |
HIP 113350 |
19.28 |
| 2026-10-03 12:00 |
23:00:25.97 |
+66:04:15.6 |
HIP 113350 |
18.82 |
| 2026-10-04 00:00 |
23:00:21.68 |
+66:03:56.7 |
HIP 113350 |
18.37 |
| 2026-10-04 12:00 |
23:00:17.42 |
+66:03:37.5 |
HIP 113350 |
17.92 |
| 2026-10-05 00:00 |
23:00:13.18 |
+66:03:18.2 |
HIP 113350 |
17.49 |
| 2026-10-05 12:00 |
23:00:08.96 |
+66:02:58.6 |
HIP 113350 |
17.06 |
| 2026-10-06 00:00 |
23:00:04.76 |
+66:02:38.7 |
HIP 113350 |
16.64 |
| 2026-10-06 12:00 |
23:00:00.58 |
+66:02:18.7 |
HIP 113350 |
16.23 |
| 2026-10-07 00:00 |
22:59:56.43 |
+66:01:58.4 |
HIP 113350 |
15.83 |
| 2026-10-07 12:00 |
22:59:52.30 |
+66:01:37.9 |
HIP 113350 |
15.44 |
| 2026-10-08 00:00 |
22:59:48.19 |
+66:01:17.2 |
HIP 113350 |
15.06 |
| 2026-10-08 12:00 |
22:59:44.10 |
+66:00:56.3 |
HIP 113350 |
14.69 |
| 2026-10-09 00:00 |
22:59:40.03 |
+66:00:35.1 |
HIP 113350 |
14.34 |
| 2026-10-09 12:00 |
22:59:35.99 |
+66:00:13.8 |
HIP 113350 |
14.00 |
| 2026-10-10 00:00 |
22:59:31.98 |
+65:59:52.2 |
HIP 113350 |
13.68 |
| 2026-10-10 12:00 |
22:59:27.98 |
+65:59:30.4 |
HIP 113350 |
13.38 |
| 2026-10-11 00:00 |
22:59:24.02 |
+65:59:08.4 |
HIP 113350 |
13.10 |