메타데이터
| 항목 |
값 |
| Designation |
C/1964 N1 (Ikeya) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1964-08-01T05:13:48.668160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:16Z |
| Obs used |
36 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1964-07-28.0000000 |
| e |
0.98529909 |
| q (au) |
0.821742 |
| a (au) |
55.897329 |
| i (deg) |
171.919437 |
| Ω (om, deg) |
269.947994 |
| ω (w, deg) |
290.768689 |
| M (ma, deg) |
359.990052 |
밝기
산란 + 전체 선형
$$
M_a = (7.144 + 3.169\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.144 |
| n |
3.169 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.000 |
| 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 |
11:22:10.40 |
+12:29:49.8 |
HIP 55428 |
16.57 |
| 2026-09-20 12:00 |
11:22:11.87 |
+12:29:41.2 |
HIP 55428 |
16.95 |
| 2026-09-21 00:00 |
11:22:13.35 |
+12:29:32.6 |
HIP 55428 |
17.34 |
| 2026-09-21 12:00 |
11:22:14.83 |
+12:29:24.0 |
HIP 55428 |
17.72 |
| 2026-09-22 00:00 |
11:22:16.30 |
+12:29:15.5 |
HIP 55428 |
18.10 |
| 2026-09-22 12:00 |
11:22:17.77 |
+12:29:07.0 |
HIP 55428 |
18.49 |
| 2026-09-23 00:00 |
11:22:19.24 |
+12:28:58.6 |
HIP 55428 |
18.87 |
| 2026-09-23 12:00 |
11:22:20.71 |
+12:28:50.2 |
HIP 55428 |
19.25 |
| 2026-09-24 00:00 |
11:22:22.18 |
+12:28:41.8 |
HIP 55428 |
19.63 |
| 2026-09-24 12:00 |
11:22:23.64 |
+12:28:33.5 |
HIP 55428 |
20.01 |
| 2026-09-25 00:00 |
11:22:25.10 |
+12:28:25.2 |
HIP 55428 |
20.39 |
| 2026-09-25 12:00 |
11:22:26.56 |
+12:28:17.0 |
HIP 55428 |
20.77 |
| 2026-09-26 00:00 |
11:22:28.01 |
+12:28:08.9 |
HIP 55428 |
21.15 |
| 2026-09-26 12:00 |
11:22:29.46 |
+12:28:00.7 |
HIP 55428 |
21.52 |
| 2026-09-27 00:00 |
11:22:30.91 |
+12:27:52.7 |
HIP 55428 |
21.90 |
| 2026-09-27 12:00 |
11:22:32.36 |
+12:27:44.6 |
HIP 55428 |
22.28 |
| 2026-09-28 00:00 |
11:22:33.80 |
+12:27:36.7 |
HIP 55428 |
22.65 |
| 2026-09-28 12:00 |
11:22:35.24 |
+12:27:28.7 |
HIP 55428 |
23.02 |
| 2026-09-29 00:00 |
11:22:36.68 |
+12:27:20.8 |
HIP 55654 |
22.76 |
| 2026-09-29 12:00 |
11:22:38.11 |
+12:27:13.0 |
HIP 55654 |
22.41 |
| 2026-09-30 00:00 |
11:22:39.54 |
+12:27:05.2 |
HIP 55654 |
22.07 |
| 2026-09-30 12:00 |
11:22:40.96 |
+12:26:57.5 |
HIP 55654 |
21.72 |
| 2026-10-01 00:00 |
11:22:42.39 |
+12:26:49.8 |
HIP 55654 |
21.38 |
| 2026-10-01 12:00 |
11:22:43.80 |
+12:26:42.2 |
HIP 55654 |
21.04 |
| 2026-10-02 00:00 |
11:22:45.22 |
+12:26:34.6 |
HIP 55654 |
20.70 |
| 2026-10-02 12:00 |
11:22:46.63 |
+12:26:27.1 |
HIP 55654 |
20.36 |
| 2026-10-03 00:00 |
11:22:48.03 |
+12:26:19.6 |
HIP 55654 |
20.03 |
| 2026-10-03 12:00 |
11:22:49.43 |
+12:26:12.2 |
HIP 55654 |
19.70 |
| 2026-10-04 00:00 |
11:22:50.83 |
+12:26:04.9 |
HIP 55654 |
19.37 |
| 2026-10-04 12:00 |
11:22:52.22 |
+12:25:57.6 |
HIP 55654 |
19.04 |
| 2026-10-05 00:00 |
11:22:53.61 |
+12:25:50.3 |
HIP 55654 |
18.71 |
| 2026-10-05 12:00 |
11:22:55.00 |
+12:25:43.1 |
HIP 55654 |
18.39 |
| 2026-10-06 00:00 |
11:22:56.38 |
+12:25:36.0 |
HIP 55654 |
18.07 |
| 2026-10-06 12:00 |
11:22:57.75 |
+12:25:28.9 |
HIP 55654 |
17.75 |
| 2026-10-07 00:00 |
11:22:59.12 |
+12:25:21.9 |
HIP 55654 |
17.43 |
| 2026-10-07 12:00 |
11:23:00.48 |
+12:25:15.0 |
HIP 55654 |
17.12 |
| 2026-10-08 00:00 |
11:23:01.84 |
+12:25:08.1 |
HIP 55654 |
16.81 |
| 2026-10-08 12:00 |
11:23:03.19 |
+12:25:01.2 |
HIP 55654 |
16.50 |
| 2026-10-09 00:00 |
11:23:04.54 |
+12:24:54.5 |
HIP 55654 |
16.20 |
| 2026-10-09 12:00 |
11:23:05.88 |
+12:24:47.7 |
HIP 55654 |
15.89 |
| 2026-10-10 00:00 |
11:23:07.22 |
+12:24:41.1 |
HIP 55654 |
15.59 |
| 2026-10-10 12:00 |
11:23:08.55 |
+12:24:34.5 |
HIP 55654 |
15.30 |
| 2026-10-11 00:00 |
11:23:09.88 |
+12:24:28.0 |
HIP 55654 |
15.00 |