메타데이터
| 항목 |
값 |
| Designation |
C/1973 N1 (Sandage) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1973-11-08T03:45:29.695680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:22Z |
| Obs used |
27 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1974-02-27.0000000 |
| e |
1.00022570 |
| q (au) |
4.812051 |
| a (au) |
-21320.457837 |
| i (deg) |
137.403627 |
| Ω (om, deg) |
279.241065 |
| ω (w, deg) |
72.546350 |
| M (ma, deg) |
0.000035 |
밝기
산란 + 전체 선형
$$
M_a = (7.938 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.938 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-06-01 00:00 |
04:30:10.55 |
-05:46:59.1 |
HIP 20932 |
14.19 |
| 2026-06-01 12:00 |
04:30:12.05 |
-05:46:56.8 |
HIP 20932 |
14.51 |
| 2026-06-02 00:00 |
04:30:13.55 |
-05:46:54.6 |
HIP 20932 |
14.83 |
| 2026-06-02 12:00 |
04:30:15.04 |
-05:46:52.5 |
HIP 20932 |
15.16 |
| 2026-06-03 00:00 |
04:30:16.54 |
-05:46:50.4 |
HIP 20932 |
15.49 |
| 2026-06-03 12:00 |
04:30:18.03 |
-05:46:48.5 |
HIP 20932 |
15.82 |
| 2026-06-04 00:00 |
04:30:19.53 |
-05:46:46.6 |
HIP 20932 |
16.15 |
| 2026-06-04 12:00 |
04:30:21.02 |
-05:46:44.9 |
HIP 20932 |
16.49 |
| 2026-06-05 00:00 |
04:30:22.51 |
-05:46:43.2 |
HIP 20932 |
16.82 |
| 2026-06-05 12:00 |
04:30:24.00 |
-05:46:41.7 |
HIP 20932 |
17.16 |
| 2026-06-06 00:00 |
04:30:25.49 |
-05:46:40.2 |
HIP 20932 |
17.50 |
| 2026-06-06 12:00 |
04:30:26.98 |
-05:46:38.8 |
HIP 20932 |
17.85 |
| 2026-06-07 00:00 |
04:30:28.47 |
-05:46:37.5 |
HIP 20932 |
18.19 |
| 2026-06-07 12:00 |
04:30:29.96 |
-05:46:36.3 |
HIP 20932 |
18.53 |
| 2026-06-08 00:00 |
04:30:31.44 |
-05:46:35.2 |
HIP 20932 |
18.88 |
| 2026-06-08 12:00 |
04:30:32.93 |
-05:46:34.2 |
HIP 20932 |
19.23 |
| 2026-06-09 00:00 |
04:30:34.41 |
-05:46:33.3 |
HIP 20932 |
19.57 |
| 2026-06-09 12:00 |
04:30:35.89 |
-05:46:32.5 |
HIP 20932 |
19.92 |
| 2026-06-10 00:00 |
04:30:37.36 |
-05:46:31.8 |
HIP 20932 |
20.27 |
| 2026-06-10 12:00 |
04:30:38.84 |
-05:46:31.1 |
HIP 20932 |
20.62 |
| 2026-06-11 00:00 |
04:30:40.31 |
-05:46:30.6 |
HIP 20932 |
20.97 |
| 2026-06-11 12:00 |
04:30:41.78 |
-05:46:30.1 |
HIP 20932 |
21.32 |
| 2026-06-12 00:00 |
04:30:43.25 |
-05:46:29.8 |
HIP 20932 |
21.67 |
| 2026-06-12 12:00 |
04:30:44.72 |
-05:46:29.6 |
HIP 20932 |
22.02 |
| 2026-06-13 00:00 |
04:30:46.18 |
-05:46:29.4 |
HIP 20932 |
22.37 |
| 2026-06-13 12:00 |
04:30:47.64 |
-05:46:29.3 |
HIP 20932 |
22.73 |
| 2026-06-14 00:00 |
04:30:49.10 |
-05:46:29.4 |
HIP 20932 |
23.08 |
| 2026-06-14 12:00 |
04:30:50.56 |
-05:46:29.5 |
HIP 20932 |
23.43 |
| 2026-06-15 00:00 |
04:30:52.01 |
-05:46:29.7 |
HIP 20932 |
23.78 |
| 2026-06-15 12:00 |
04:30:53.46 |
-05:46:30.1 |
HIP 20932 |
24.13 |
| 2026-06-16 00:00 |
04:30:54.90 |
-05:46:30.5 |
HIP 20932 |
24.48 |
| 2026-06-16 12:00 |
04:30:56.35 |
-05:46:31.0 |
HIP 20932 |
24.83 |
| 2026-06-17 00:00 |
04:30:57.78 |
-05:46:31.6 |
HIP 20932 |
25.19 |
| 2026-06-17 12:00 |
04:30:59.22 |
-05:46:32.3 |
HIP 20932 |
25.54 |
| 2026-06-18 00:00 |
04:31:00.65 |
-05:46:33.1 |
HIP 20932 |
25.89 |
| 2026-06-18 12:00 |
04:31:02.08 |
-05:46:34.0 |
HIP 20932 |
26.24 |
| 2026-06-19 00:00 |
04:31:03.50 |
-05:46:35.0 |
HIP 20932 |
26.58 |
| 2026-06-19 12:00 |
04:31:04.92 |
-05:46:36.1 |
HIP 20932 |
26.93 |
| 2026-06-20 00:00 |
04:31:06.34 |
-05:46:37.3 |
HIP 20932 |
27.28 |
| 2026-06-20 12:00 |
04:31:07.75 |
-05:46:38.5 |
HIP 20932 |
27.63 |
| 2026-06-21 00:00 |
04:31:09.15 |
-05:46:39.9 |
HIP 20932 |
27.98 |
| 2026-06-21 12:00 |
04:31:10.56 |
-05:46:41.4 |
HIP 20932 |
28.32 |
| 2026-06-22 00:00 |
04:31:11.95 |
-05:46:42.9 |
HIP 20932 |
28.67 |