메타데이터
| 항목 |
값 |
| Designation |
C/1959 Q1 (Alcock) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1959-08-17T14:42:54.362880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
22 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1959-09-21.0000000 |
| e |
1.00130906 |
| q (au) |
1.150410 |
| a (au) |
-878.806801 |
| i (deg) |
48.258940 |
| Ω (om, deg) |
159.919935 |
| ω (w, deg) |
124.713032 |
| M (ma, deg) |
0.001301 |
밝기
산란 + 전체 선형
$$
M_a = (8.983 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.983 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 1959-08-25 |
1959-11-05 |
+39.7685 |
-2.674 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
06:31:06.88 |
-20:28:48.3 |
HIP 31094 |
16.21 |
| 2026-05-12 12:00 |
06:31:07.83 |
-20:28:39.2 |
HIP 31094 |
16.28 |
| 2026-05-13 00:00 |
06:31:08.78 |
-20:28:30.1 |
HIP 31094 |
16.35 |
| 2026-05-13 12:00 |
06:31:09.75 |
-20:28:21.2 |
HIP 31094 |
16.43 |
| 2026-05-14 00:00 |
06:31:10.72 |
-20:28:12.3 |
HIP 31094 |
16.50 |
| 2026-05-14 12:00 |
06:31:11.70 |
-20:28:03.5 |
HIP 31094 |
16.58 |
| 2026-05-15 00:00 |
06:31:12.69 |
-20:27:54.8 |
HIP 31094 |
16.66 |
| 2026-05-15 12:00 |
06:31:13.68 |
-20:27:46.2 |
HIP 31094 |
16.75 |
| 2026-05-16 00:00 |
06:31:14.68 |
-20:27:37.7 |
HIP 31094 |
16.83 |
| 2026-05-16 12:00 |
06:31:15.69 |
-20:27:29.2 |
HIP 31094 |
16.92 |
| 2026-05-17 00:00 |
06:31:16.71 |
-20:27:20.9 |
HIP 31094 |
17.01 |
| 2026-05-17 12:00 |
06:31:17.74 |
-20:27:12.6 |
HIP 31094 |
17.10 |
| 2026-05-18 00:00 |
06:31:18.77 |
-20:27:04.4 |
HIP 31094 |
17.20 |
| 2026-05-18 12:00 |
06:31:19.81 |
-20:26:56.3 |
HIP 31094 |
17.29 |
| 2026-05-19 00:00 |
06:31:20.86 |
-20:26:48.3 |
HIP 31094 |
17.39 |
| 2026-05-19 12:00 |
06:31:21.91 |
-20:26:40.4 |
HIP 31094 |
17.49 |
| 2026-05-20 00:00 |
06:31:22.98 |
-20:26:32.6 |
HIP 31094 |
17.60 |
| 2026-05-20 12:00 |
06:31:24.04 |
-20:26:24.9 |
HIP 31094 |
17.70 |
| 2026-05-21 00:00 |
06:31:25.12 |
-20:26:17.3 |
HIP 31094 |
17.81 |
| 2026-05-21 12:00 |
06:31:26.20 |
-20:26:09.7 |
HIP 31094 |
17.92 |
| 2026-05-22 00:00 |
06:31:27.29 |
-20:26:02.3 |
HIP 31094 |
18.03 |
| 2026-05-22 12:00 |
06:31:28.39 |
-20:25:55.0 |
HIP 31094 |
18.15 |
| 2026-05-23 00:00 |
06:31:29.49 |
-20:25:47.7 |
HIP 31094 |
18.26 |
| 2026-05-23 12:00 |
06:31:30.60 |
-20:25:40.5 |
HIP 31094 |
18.38 |
| 2026-05-24 00:00 |
06:31:31.71 |
-20:25:33.5 |
HIP 31094 |
18.50 |
| 2026-05-24 12:00 |
06:31:32.83 |
-20:25:26.5 |
HIP 31094 |
18.63 |
| 2026-05-25 00:00 |
06:31:33.96 |
-20:25:19.6 |
HIP 31094 |
18.75 |
| 2026-05-25 12:00 |
06:31:35.09 |
-20:25:12.9 |
HIP 31094 |
18.88 |
| 2026-05-26 00:00 |
06:31:36.23 |
-20:25:06.2 |
HIP 31094 |
19.01 |
| 2026-05-26 12:00 |
06:31:37.38 |
-20:24:59.6 |
HIP 31094 |
19.14 |
| 2026-05-27 00:00 |
06:31:38.53 |
-20:24:53.1 |
HIP 31094 |
19.27 |
| 2026-05-27 12:00 |
06:31:39.69 |
-20:24:46.7 |
HIP 31094 |
19.40 |
| 2026-05-28 00:00 |
06:31:40.85 |
-20:24:40.4 |
HIP 31094 |
19.54 |
| 2026-05-28 12:00 |
06:31:42.02 |
-20:24:34.2 |
HIP 31094 |
19.68 |
| 2026-05-29 00:00 |
06:31:43.20 |
-20:24:28.1 |
HIP 31094 |
19.82 |
| 2026-05-29 12:00 |
06:31:44.37 |
-20:24:22.1 |
HIP 31094 |
19.96 |
| 2026-05-30 00:00 |
06:31:45.56 |
-20:24:16.2 |
HIP 31094 |
20.11 |
| 2026-05-30 12:00 |
06:31:46.75 |
-20:24:10.4 |
HIP 31094 |
20.25 |
| 2026-05-31 00:00 |
06:31:47.95 |
-20:24:04.7 |
HIP 31094 |
20.40 |
| 2026-05-31 12:00 |
06:31:49.15 |
-20:23:59.1 |
HIP 31094 |
20.55 |
| 2026-06-01 00:00 |
06:31:50.35 |
-20:23:53.6 |
HIP 31094 |
20.70 |
| 2026-06-01 12:00 |
06:31:51.56 |
-20:23:48.2 |
HIP 31094 |
20.86 |
| 2026-06-02 00:00 |
06:31:52.78 |
-20:23:42.9 |
HIP 31094 |
21.01 |