메타데이터
| 항목 |
값 |
| Designation |
C/1959 Q2 (Alcock) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1959-09-15T21:07:08.423040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
14 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1959-09-04.0000000 |
| e |
1.00043121 |
| q (au) |
0.165808 |
| a (au) |
-384.520510 |
| i (deg) |
108.035726 |
| Ω (om, deg) |
225.841022 |
| ω (w, deg) |
300.535111 |
| M (ma, deg) |
-0.001553 |
밝기
산란 + 전체 선형
$$
M_a = (7.563 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.563 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| 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) |
| 2026-05-12 00:00 |
03:22:45.13 |
+80:33:23.0 |
HIP 15463 |
15.74 |
| 2026-05-12 12:00 |
03:22:52.41 |
+80:33:24.3 |
HIP 15463 |
15.92 |
| 2026-05-13 00:00 |
03:22:59.70 |
+80:33:25.8 |
HIP 15463 |
16.11 |
| 2026-05-13 12:00 |
03:23:06.99 |
+80:33:27.4 |
HIP 15463 |
16.30 |
| 2026-05-14 00:00 |
03:23:14.28 |
+80:33:29.1 |
HIP 15463 |
16.49 |
| 2026-05-14 12:00 |
03:23:21.57 |
+80:33:31.0 |
HIP 15463 |
16.70 |
| 2026-05-15 00:00 |
03:23:28.86 |
+80:33:33.0 |
HIP 15463 |
16.90 |
| 2026-05-15 12:00 |
03:23:36.15 |
+80:33:35.1 |
HIP 15463 |
17.11 |
| 2026-05-16 00:00 |
03:23:43.45 |
+80:33:37.4 |
HIP 15463 |
17.33 |
| 2026-05-16 12:00 |
03:23:50.74 |
+80:33:39.8 |
HIP 15463 |
17.55 |
| 2026-05-17 00:00 |
03:23:58.02 |
+80:33:42.3 |
HIP 15463 |
17.77 |
| 2026-05-17 12:00 |
03:24:05.31 |
+80:33:44.9 |
HIP 15463 |
18.00 |
| 2026-05-18 00:00 |
03:24:12.59 |
+80:33:47.7 |
HIP 15463 |
18.23 |
| 2026-05-18 12:00 |
03:24:19.87 |
+80:33:50.6 |
HIP 15463 |
18.47 |
| 2026-05-19 00:00 |
03:24:27.15 |
+80:33:53.6 |
HIP 15463 |
18.71 |
| 2026-05-19 12:00 |
03:24:34.43 |
+80:33:56.8 |
HIP 15463 |
18.95 |
| 2026-05-20 00:00 |
03:24:41.69 |
+80:34:00.1 |
HIP 15463 |
19.20 |
| 2026-05-20 12:00 |
03:24:48.96 |
+80:34:03.5 |
HIP 15463 |
19.44 |
| 2026-05-21 00:00 |
03:24:56.22 |
+80:34:07.0 |
HIP 15463 |
19.70 |
| 2026-05-21 12:00 |
03:25:03.47 |
+80:34:10.7 |
HIP 15463 |
19.95 |
| 2026-05-22 00:00 |
03:25:10.72 |
+80:34:14.5 |
HIP 15463 |
20.21 |
| 2026-05-22 12:00 |
03:25:17.96 |
+80:34:18.4 |
HIP 15463 |
20.47 |
| 2026-05-23 00:00 |
03:25:25.19 |
+80:34:22.4 |
HIP 15463 |
20.73 |
| 2026-05-23 12:00 |
03:25:32.42 |
+80:34:26.6 |
HIP 15463 |
20.99 |
| 2026-05-24 00:00 |
03:25:39.64 |
+80:34:30.9 |
HIP 15463 |
21.26 |
| 2026-05-24 12:00 |
03:25:46.85 |
+80:34:35.3 |
HIP 15463 |
21.53 |
| 2026-05-25 00:00 |
03:25:54.05 |
+80:34:39.9 |
HIP 15463 |
21.80 |
| 2026-05-25 12:00 |
03:26:01.24 |
+80:34:44.5 |
HIP 15463 |
22.07 |
| 2026-05-26 00:00 |
03:26:08.42 |
+80:34:49.3 |
HIP 15463 |
22.35 |
| 2026-05-26 12:00 |
03:26:15.60 |
+80:34:54.2 |
HIP 15463 |
22.62 |
| 2026-05-27 00:00 |
03:26:22.76 |
+80:34:59.3 |
HIP 15463 |
22.90 |
| 2026-05-27 12:00 |
03:26:29.91 |
+80:35:04.4 |
HIP 15463 |
23.18 |
| 2026-05-28 00:00 |
03:26:37.05 |
+80:35:09.7 |
HIP 15463 |
23.46 |
| 2026-05-28 12:00 |
03:26:44.18 |
+80:35:15.1 |
HIP 15463 |
23.75 |
| 2026-05-29 00:00 |
03:26:51.30 |
+80:35:20.6 |
HIP 15463 |
24.03 |
| 2026-05-29 12:00 |
03:26:58.40 |
+80:35:26.3 |
HIP 15463 |
24.32 |
| 2026-05-30 00:00 |
03:27:05.50 |
+80:35:32.1 |
HIP 15463 |
24.60 |
| 2026-05-30 12:00 |
03:27:12.58 |
+80:35:37.9 |
HIP 15463 |
24.89 |
| 2026-05-31 00:00 |
03:27:19.64 |
+80:35:43.9 |
HIP 15463 |
25.18 |
| 2026-05-31 12:00 |
03:27:26.70 |
+80:35:50.1 |
HIP 15463 |
25.47 |
| 2026-06-01 00:00 |
03:27:33.73 |
+80:35:56.3 |
HIP 15463 |
25.76 |
| 2026-06-01 12:00 |
03:27:40.76 |
+80:36:02.7 |
HIP 15463 |
26.06 |
| 2026-06-02 00:00 |
03:27:47.77 |
+80:36:09.1 |
HIP 15463 |
26.35 |