메타데이터
| 항목 |
값 |
| Designation |
479P/Elenin |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-05-05T07:27:38.416320Z |
| Orbit solution date (soln_date, UTC) |
2024-08-11T00:12:26Z |
| Obs used |
990 |
| NEO |
Yes |
| M1 |
16.200 |
| K1 |
6.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-11-18T13:30:33.264000Z |
| Discovery magnitude (MPC) |
21.79 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-03-04.0000000 |
| e |
0.77856369 |
| q (au) |
1.244472 |
| a (au) |
5.619998 |
| i (deg) |
15.393352 |
| Ω (om, deg) |
295.845766 |
| ω (w, deg) |
263.493717 |
| M (ma, deg) |
328.314623 |
밝기
산란 + 전체 선형
$$
M_a = (15.000 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.000 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.637 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2023-10-17 |
2024-05-04 |
+6.0878 |
-1.609 |
| 2024-05-05 |
2024-08-05 |
+11.6597 |
-2.541 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
23:16:19.30 |
+10:07:15.1 |
HIP 114930 |
29.54 |
| 2026-07-29 12:00 |
23:16:08.99 |
+10:07:12.1 |
HIP 114930 |
30.29 |
| 2026-07-30 00:00 |
23:15:58.56 |
+10:07:08.1 |
HIP 114698 |
27.88 |
| 2026-07-30 12:00 |
23:15:48.01 |
+10:07:02.9 |
HIP 114698 |
25.30 |
| 2026-07-31 00:00 |
23:15:37.36 |
+10:06:56.7 |
HIP 114698 |
22.71 |
| 2026-07-31 12:00 |
23:15:26.59 |
+10:06:49.3 |
HIP 114698 |
20.10 |
| 2026-08-01 00:00 |
23:15:15.71 |
+10:06:40.8 |
HIP 114698 |
17.47 |
| 2026-08-01 12:00 |
23:15:04.72 |
+10:06:31.1 |
HIP 114698 |
14.85 |
| 2026-08-02 00:00 |
23:14:53.62 |
+10:06:20.4 |
HIP 114698 |
12.24 |
| 2026-08-02 12:00 |
23:14:42.41 |
+10:06:08.5 |
HIP 114698 |
9.68 |
| 2026-08-03 00:00 |
23:14:31.09 |
+10:05:55.6 |
HIP 114698 |
7.27 |
| 2026-08-03 12:00 |
23:14:19.67 |
+10:05:41.5 |
HIP 114698 |
5.24 |
| 2026-08-04 00:00 |
23:14:08.14 |
+10:05:26.2 |
HIP 114698 |
4.25 |
| 2026-08-04 12:00 |
23:13:56.51 |
+10:05:09.9 |
HIP 114698 |
5.03 |
| 2026-08-05 00:00 |
23:13:44.78 |
+10:04:52.4 |
HIP 114698 |
7.03 |
| 2026-08-05 12:00 |
23:13:32.94 |
+10:04:33.8 |
HIP 114698 |
9.54 |
| 2026-08-06 00:00 |
23:13:21.01 |
+10:04:14.2 |
HIP 114698 |
12.27 |
| 2026-08-06 12:00 |
23:13:08.98 |
+10:03:53.3 |
HIP 114698 |
15.11 |
| 2026-08-07 00:00 |
23:12:56.84 |
+10:03:31.4 |
HIP 114698 |
18.03 |
| 2026-08-07 12:00 |
23:12:44.61 |
+10:03:08.4 |
HIP 114698 |
21.00 |
| 2026-08-08 00:00 |
23:12:32.29 |
+10:02:44.2 |
HIP 114698 |
24.02 |
| 2026-08-08 12:00 |
23:12:19.87 |
+10:02:18.9 |
HIP 114698 |
27.07 |
| 2026-08-09 00:00 |
23:12:07.36 |
+10:01:52.5 |
HIP 114444 |
26.38 |
| 2026-08-09 12:00 |
23:11:54.76 |
+10:01:25.1 |
HIP 114444 |
23.61 |
| 2026-08-10 00:00 |
23:11:42.07 |
+10:00:56.5 |
HIP 114444 |
20.93 |
| 2026-08-10 12:00 |
23:11:29.29 |
+10:00:26.8 |
HIP 114444 |
18.36 |
| 2026-08-11 00:00 |
23:11:16.42 |
+09:59:56.0 |
HIP 114444 |
15.99 |
| 2026-08-11 12:00 |
23:11:03.47 |
+09:59:24.1 |
HIP 114444 |
13.94 |
| 2026-08-12 00:00 |
23:10:50.43 |
+09:58:51.1 |
HIP 114444 |
12.38 |
| 2026-08-12 12:00 |
23:10:37.31 |
+09:58:17.0 |
HIP 114444 |
11.54 |
| 2026-08-13 00:00 |
23:10:24.11 |
+09:57:41.8 |
HIP 114389 |
10.06 |
| 2026-08-13 12:00 |
23:10:10.84 |
+09:57:05.6 |
HIP 114389 |
8.10 |
| 2026-08-14 00:00 |
23:09:57.48 |
+09:56:28.2 |
HIP 114389 |
7.21 |
| 2026-08-14 12:00 |
23:09:44.05 |
+09:55:49.9 |
HIP 114389 |
7.79 |
| 2026-08-15 00:00 |
23:09:30.55 |
+09:55:10.4 |
HIP 114389 |
9.60 |
| 2026-08-15 12:00 |
23:09:16.97 |
+09:54:29.9 |
HIP 114389 |
12.12 |
| 2026-08-16 00:00 |
23:09:03.33 |
+09:53:48.3 |
HIP 114389 |
15.01 |
| 2026-08-16 12:00 |
23:08:49.61 |
+09:53:05.7 |
HIP 114389 |
18.10 |
| 2026-08-17 00:00 |
23:08:35.83 |
+09:52:22.0 |
HIP 114389 |
21.31 |
| 2026-08-17 12:00 |
23:08:21.98 |
+09:51:37.3 |
HIP 114389 |
24.61 |
| 2026-08-18 00:00 |
23:08:08.07 |
+09:50:51.6 |
HIP 114389 |
27.98 |
| 2026-08-18 12:00 |
23:07:54.10 |
+09:50:04.8 |
HIP 114144 |
28.75 |
| 2026-08-19 00:00 |
23:07:40.07 |
+09:49:17.0 |
HIP 114061 |
26.18 |