메타데이터
| 항목 |
값 |
| Designation |
C/1913 Y1 (Delavan) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1914-10-26T18:27:07.724160Z |
| Orbit solution date (soln_date, UTC) |
2024-04-15T15:43:28Z |
| Obs used |
157 |
| NEO |
- |
| M1 |
4.800 |
| K1 |
4.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1914-03-15.0000000 |
| e |
1.00014579 |
| q (au) |
1.104401 |
| a (au) |
-7575.468577 |
| i (deg) |
68.042932 |
| Ω (om, deg) |
60.397252 |
| ω (w, deg) |
97.469440 |
| M (ma, deg) |
-0.000337 |
밝기
산란 + 전체 선형
$$
M_a = (-2.437 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
-2.437 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
01:54:36.60 |
-70:24:10.0 |
HIP 8834 |
7.87 |
| 2026-07-29 12:00 |
01:54:36.38 |
-70:24:23.3 |
HIP 8834 |
8.03 |
| 2026-07-30 00:00 |
01:54:36.13 |
-70:24:36.6 |
HIP 8834 |
8.19 |
| 2026-07-30 12:00 |
01:54:35.86 |
-70:24:49.9 |
HIP 8834 |
8.35 |
| 2026-07-31 00:00 |
01:54:35.57 |
-70:25:03.1 |
HIP 8834 |
8.52 |
| 2026-07-31 12:00 |
01:54:35.26 |
-70:25:16.4 |
HIP 8834 |
8.69 |
| 2026-08-01 00:00 |
01:54:34.93 |
-70:25:29.6 |
HIP 8834 |
8.85 |
| 2026-08-01 12:00 |
01:54:34.58 |
-70:25:42.9 |
HIP 8834 |
9.02 |
| 2026-08-02 00:00 |
01:54:34.21 |
-70:25:56.1 |
HIP 8834 |
9.19 |
| 2026-08-02 12:00 |
01:54:33.81 |
-70:26:09.3 |
HIP 8834 |
9.36 |
| 2026-08-03 00:00 |
01:54:33.40 |
-70:26:22.5 |
HIP 8834 |
9.54 |
| 2026-08-03 12:00 |
01:54:32.96 |
-70:26:35.7 |
HIP 8834 |
9.71 |
| 2026-08-04 00:00 |
01:54:32.50 |
-70:26:48.9 |
HIP 8834 |
9.88 |
| 2026-08-04 12:00 |
01:54:32.02 |
-70:27:02.1 |
HIP 8834 |
10.06 |
| 2026-08-05 00:00 |
01:54:31.52 |
-70:27:15.2 |
HIP 8834 |
10.23 |
| 2026-08-05 12:00 |
01:54:31.00 |
-70:27:28.3 |
HIP 8834 |
10.41 |
| 2026-08-06 00:00 |
01:54:30.45 |
-70:27:41.5 |
HIP 8834 |
10.59 |
| 2026-08-06 12:00 |
01:54:29.89 |
-70:27:54.5 |
HIP 8834 |
10.77 |
| 2026-08-07 00:00 |
01:54:29.30 |
-70:28:07.6 |
HIP 8834 |
10.94 |
| 2026-08-07 12:00 |
01:54:28.69 |
-70:28:20.7 |
HIP 8834 |
11.12 |
| 2026-08-08 00:00 |
01:54:28.07 |
-70:28:33.7 |
HIP 8834 |
11.30 |
| 2026-08-08 12:00 |
01:54:27.42 |
-70:28:46.7 |
HIP 8834 |
11.48 |
| 2026-08-09 00:00 |
01:54:26.75 |
-70:28:59.7 |
HIP 8834 |
11.67 |
| 2026-08-09 12:00 |
01:54:26.05 |
-70:29:12.7 |
HIP 8834 |
11.85 |
| 2026-08-10 00:00 |
01:54:25.34 |
-70:29:25.6 |
HIP 8834 |
12.03 |
| 2026-08-10 12:00 |
01:54:24.61 |
-70:29:38.5 |
HIP 8834 |
12.21 |
| 2026-08-11 00:00 |
01:54:23.85 |
-70:29:51.4 |
HIP 8834 |
12.39 |
| 2026-08-11 12:00 |
01:54:23.08 |
-70:30:04.2 |
HIP 8834 |
12.58 |
| 2026-08-12 00:00 |
01:54:22.28 |
-70:30:17.1 |
HIP 8834 |
12.76 |
| 2026-08-12 12:00 |
01:54:21.46 |
-70:30:29.8 |
HIP 8834 |
12.94 |
| 2026-08-13 00:00 |
01:54:20.62 |
-70:30:42.6 |
HIP 8834 |
13.13 |
| 2026-08-13 12:00 |
01:54:19.77 |
-70:30:55.3 |
HIP 8834 |
13.31 |
| 2026-08-14 00:00 |
01:54:18.89 |
-70:31:08.0 |
HIP 8834 |
13.50 |
| 2026-08-14 12:00 |
01:54:17.99 |
-70:31:20.7 |
HIP 8834 |
13.68 |
| 2026-08-15 00:00 |
01:54:17.06 |
-70:31:33.3 |
HIP 8834 |
13.87 |
| 2026-08-15 12:00 |
01:54:16.12 |
-70:31:45.9 |
HIP 8834 |
14.05 |
| 2026-08-16 00:00 |
01:54:15.16 |
-70:31:58.4 |
HIP 8834 |
14.23 |
| 2026-08-16 12:00 |
01:54:14.18 |
-70:32:10.9 |
HIP 8834 |
14.42 |
| 2026-08-17 00:00 |
01:54:13.17 |
-70:32:23.4 |
HIP 8834 |
14.61 |
| 2026-08-17 12:00 |
01:54:12.15 |
-70:32:35.8 |
HIP 8834 |
14.79 |
| 2026-08-18 00:00 |
01:54:11.11 |
-70:32:48.2 |
HIP 8834 |
14.98 |
| 2026-08-18 12:00 |
01:54:10.04 |
-70:33:00.5 |
HIP 8834 |
15.16 |
| 2026-08-19 00:00 |
01:54:08.96 |
-70:33:12.8 |
HIP 8834 |
15.35 |