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 |
0.999 |
| 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) |
| 2026-05-12 00:00 |
23:12:40.40 |
+65:05:37.3 |
HIP 114792 |
16.77 |
| 2026-05-12 12:00 |
23:12:42.41 |
+65:06:03.6 |
HIP 114792 |
16.70 |
| 2026-05-13 00:00 |
23:12:44.38 |
+65:06:30.0 |
HIP 114792 |
16.65 |
| 2026-05-13 12:00 |
23:12:46.32 |
+65:06:56.5 |
HIP 114792 |
16.61 |
| 2026-05-14 00:00 |
23:12:48.22 |
+65:07:23.1 |
HIP 114792 |
16.60 |
| 2026-05-14 12:00 |
23:12:50.09 |
+65:07:49.7 |
HIP 114792 |
16.60 |
| 2026-05-15 00:00 |
23:12:51.93 |
+65:08:16.4 |
HIP 114792 |
16.62 |
| 2026-05-15 12:00 |
23:12:53.73 |
+65:08:43.1 |
HIP 114792 |
16.66 |
| 2026-05-16 00:00 |
23:12:55.50 |
+65:09:10.0 |
HIP 114792 |
16.71 |
| 2026-05-16 12:00 |
23:12:57.23 |
+65:09:36.8 |
HIP 114792 |
16.79 |
| 2026-05-17 00:00 |
23:12:58.92 |
+65:10:03.8 |
HIP 114792 |
16.88 |
| 2026-05-17 12:00 |
23:13:00.58 |
+65:10:30.8 |
HIP 114792 |
16.99 |
| 2026-05-18 00:00 |
23:13:02.21 |
+65:10:57.8 |
HIP 114792 |
17.11 |
| 2026-05-18 12:00 |
23:13:03.80 |
+65:11:25.0 |
HIP 114792 |
17.25 |
| 2026-05-19 00:00 |
23:13:05.35 |
+65:11:52.1 |
HIP 114792 |
17.41 |
| 2026-05-19 12:00 |
23:13:06.87 |
+65:12:19.3 |
HIP 114769 |
17.30 |
| 2026-05-20 00:00 |
23:13:08.35 |
+65:12:46.6 |
HIP 114769 |
16.86 |
| 2026-05-20 12:00 |
23:13:09.80 |
+65:13:13.9 |
HIP 114769 |
16.41 |
| 2026-05-21 00:00 |
23:13:11.21 |
+65:13:41.2 |
HIP 114769 |
15.98 |
| 2026-05-21 12:00 |
23:13:12.58 |
+65:14:08.6 |
HIP 114769 |
15.54 |
| 2026-05-22 00:00 |
23:13:13.92 |
+65:14:36.0 |
HIP 114769 |
15.12 |
| 2026-05-22 12:00 |
23:13:15.22 |
+65:15:03.5 |
HIP 114769 |
14.69 |
| 2026-05-23 00:00 |
23:13:16.49 |
+65:15:31.0 |
HIP 114769 |
14.28 |
| 2026-05-23 12:00 |
23:13:17.72 |
+65:15:58.5 |
HIP 114769 |
13.87 |
| 2026-05-24 00:00 |
23:13:18.91 |
+65:16:26.1 |
HIP 114769 |
13.46 |
| 2026-05-24 12:00 |
23:13:20.06 |
+65:16:53.7 |
HIP 114769 |
13.07 |
| 2026-05-25 00:00 |
23:13:21.18 |
+65:17:21.3 |
HIP 114769 |
12.68 |
| 2026-05-25 12:00 |
23:13:22.26 |
+65:17:48.9 |
HIP 114769 |
12.30 |
| 2026-05-26 00:00 |
23:13:23.30 |
+65:18:16.6 |
HIP 114769 |
11.93 |
| 2026-05-26 12:00 |
23:13:24.31 |
+65:18:44.2 |
HIP 114769 |
11.57 |
| 2026-05-27 00:00 |
23:13:25.28 |
+65:19:11.9 |
HIP 114769 |
11.23 |
| 2026-05-27 12:00 |
23:13:26.21 |
+65:19:39.7 |
HIP 114769 |
10.89 |
| 2026-05-28 00:00 |
23:13:27.11 |
+65:20:07.4 |
HIP 114769 |
10.57 |
| 2026-05-28 12:00 |
23:13:27.96 |
+65:20:35.1 |
HIP 114769 |
10.27 |
| 2026-05-29 00:00 |
23:13:28.78 |
+65:21:02.9 |
HIP 114769 |
9.98 |
| 2026-05-29 12:00 |
23:13:29.57 |
+65:21:30.7 |
HIP 114769 |
9.71 |
| 2026-05-30 00:00 |
23:13:30.31 |
+65:21:58.4 |
HIP 114769 |
9.45 |
| 2026-05-30 12:00 |
23:13:31.02 |
+65:22:26.2 |
HIP 114769 |
9.22 |
| 2026-05-31 00:00 |
23:13:31.69 |
+65:22:54.0 |
HIP 114769 |
9.01 |
| 2026-05-31 12:00 |
23:13:32.32 |
+65:23:21.8 |
HIP 114769 |
8.83 |
| 2026-06-01 00:00 |
23:13:32.91 |
+65:23:49.5 |
HIP 114769 |
8.67 |
| 2026-06-01 12:00 |
23:13:33.47 |
+65:24:17.3 |
HIP 114769 |
8.54 |
| 2026-06-02 00:00 |
23:13:33.99 |
+65:24:45.1 |
HIP 114769 |
8.43 |